AAudio
Founder inventory
AirPods Max USB-C — Midnight
Inspection required
$295.00+ $20 ship
A practical marketplace
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Computers, engineering gear, books, and one-of-a-kind objects—starting with the Distributed Systems inventory.
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AAudio accessories
Founder inventory
Tech21 EvoClear case for AirPods Max
Inspection required
$35.00+ $20 ship
BBooks
Founder inventory
High School Algebra I
Unknown — handwritten list only
$5.00+ $20 ship
BBooks
Founder inventory
High School Pre-Algebra
Unknown — handwritten list only
$5.00+ $20 ship
BBooks
Founder inventory
Precalculus: Functions and Graphs
Unknown — handwritten list only
$8.00+ $20 ship
BBooks
Founder inventory
Statistics for Physicists (theory)
Unknown — handwritten list only
$20.00+ $20 ship
BBooks
Founder inventory
Statistics in Physical Science
Unknown — handwritten list only
$20.00+ $20 ship
BBooks
Founder inventory
Data Reduction and Error Analysis for the Physical Sciences — Bevington
Unknown — handwritten list only
$30.00+ $20 ship
BBooks
Founder inventory
Probability and Experimental Errors in Science — Parratt
Unknown — handwritten list only
$25.00+ $20 ship
BBooks
Founder inventory
High School Algebra 2
Unknown — handwritten list only
$5.00+ $20 ship
BBooks
Founder inventory
Calculus — Stewart
Unknown — handwritten list only
$12.00+ $20 ship
BBooks
Founder inventory
Analysis and Design of Experiments
Unknown — handwritten list only
$18.00+ $20 ship
BBooks
Founder inventory
Spatial Statistics
Unknown — handwritten list only
$30.00+ $20 ship
BBooks
Founder inventory
The Smartest Kids in the World
Unknown — handwritten list only
$8.00+ $20 ship
BBooks
Founder inventory
Time Travel
Unknown — handwritten list only
$8.00+ $20 ship
BBooks
Founder inventory
College Algebra
Unknown — handwritten list only
$8.00+ $20 ship
BBooks
Founder inventory
College Algebra and Plane Trigonometry
Unknown — handwritten list only
$10.00+ $20 ship
BBooks
Founder inventory
Introduction to Finite Mathematics
Unknown — handwritten list only
$12.00+ $20 ship
BBooks
Founder inventory
High School Algebra II
Unknown — handwritten list only
$5.00+ $20 ship
BBooks
Founder inventory
Intermediate Algebra
Unknown — handwritten list only
$5.00+ $20 ship
BBooks
Founder inventory
Mathematical Laws of Certainty
Unknown — handwritten list only
$12.00+ $20 ship
BBooks
Founder inventory
The Conspiracy of Ignorance
Unknown — handwritten list only
$8.00+ $20 ship
BBooks
Founder inventory
Modern Mathematical Analysis
Unknown — handwritten list only
$20.00+ $20 ship
BBooks
Founder inventory
Philosophy of Mathematics
Unknown — handwritten list only
$18.00+ $20 ship
BBooks
Founder inventory
Calculus — Stewart
Unknown — handwritten list only
$12.00+ $20 ship
BBooks
Founder inventory
Calculus with Analytical Geometry
Unknown — handwritten list only
$12.00+ $20 ship
BBooks
Founder inventory
Calculus with Analytical Geometry
Unknown — handwritten list only
$12.00+ $20 ship
BBooks
Founder inventory
College Mathematics
Unknown — handwritten list only
$8.00+ $20 ship
BBooks
Founder inventory
Vector Spaces and Algebras for Chemistry and Physics — F. A. Matsen
Unknown — handwritten list only
$35.00+ $20 ship
BBooks
Founder inventory
Calculus and Analytical Geometry
Unknown — handwritten list only
$12.00+ $20 ship
BBooks
Founder inventory
Mathematics for the Nonmathematician
Unknown — handwritten list only
$12.00+ $20 ship
BBooks
Founder inventory
Symbolic Logic
Unknown — handwritten list only
$18.00+ $20 ship
BBooks
Founder inventory
Calculus and Analytical Geometry
Unknown — handwritten list only
$12.00+ $20 ship
BBooks
Founder inventory
Biostatistics
Unknown — handwritten list only
$15.00+ $20 ship
BBooks
Founder inventory
Chemistry and Chemical Reactivity
Unknown — handwritten list only
$20.00+ $20 ship
BBooks
Founder inventory
Geometry
Unknown — handwritten list only
$8.00+ $20 ship
BBooks
Founder inventory
Logic and Boolean Algebra
Unknown — handwritten list only
$15.00+ $20 ship
BBooks
Founder inventory
Introduction to Logic — Suppes
Unknown — handwritten list only
$18.00+ $20 ship
BBooks
Founder inventory
Fundamentals of Scientific Mathematics
Unknown — handwritten list only
$15.00+ $20 ship
BBooks
Founder inventory
Methods of Numerical Integration
Unknown — handwritten list only
$35.00+ $20 ship
BBooks
Founder inventory
Les Mathématiques: La Géométrie
Unknown — handwritten list only
$12.00+ $20 ship
BBooks
Founder inventory
Essentials of College Algebra
Unknown — handwritten list only
$8.00+ $20 ship
BBooks
Founder inventory
Statistics for Chemistry
Unknown — handwritten list only
$15.00+ $20 ship
BBooks
Founder inventory
The Calculus of Observations
Unknown — handwritten list only
$35.00+ $20 ship
BBooks
Founder inventory
Sampling Design and Statistical Methods for Environmental Biologists
Unknown — handwritten list only
$15.00+ $20 ship
BBooks
Founder inventory
Epidemiology
Unknown — handwritten list only
$12.00+ $20 ship
BBooks
Founder inventory
Statistical Treatment of Experimental Data
Unknown — handwritten list only
$20.00+ $20 ship
BBooks
Founder inventory
Quantitative Chemical Analysis
Unknown — handwritten list only
$18.00+ $20 ship
BBooks
Founder inventory
Modern Elementary Statistics
Unknown — handwritten list only
$12.00+ $20 ship
BBooks
Founder inventory
Gateways to Algebra and Geometry
Unknown — handwritten list only
$5.00+ $20 ship
BBooks
Founder inventory
Introduction to Statistical Analysis — Dixon and Massey
Unknown — handwritten list only
$15.00+ $20 ship
BBooks
Founder inventory
Dictionary of Mathematics
Unknown — handwritten list only
$8.00+ $20 ship
BBooks
Founder inventory
Ordinary Differential Equations
Unknown — handwritten list only
$20.00+ $20 ship
BBooks
Founder inventory
Basic Geometry
Unknown — handwritten list only
$5.00+ $20 ship
BBooks
Founder inventory
Elementary Algebra
Unknown — handwritten list only
$5.00+ $20 ship
BBooks
Founder inventory
Algebra and Trigonometry
Unknown — handwritten list only
$8.00+ $20 ship
BBooks
Founder inventory
Exploring Math
Unknown — handwritten list only
$5.00+ $20 ship
BBooks
Founder inventory
Math Review Guide (GCR)
Unknown — handwritten list only
$5.00+ $20 ship
BBooks
Founder inventory
Algebra I
Unknown — handwritten list only
$5.00+ $20 ship
BBooks
Founder inventory
Introduction to Geometry
Unknown — handwritten list only
$5.00+ $20 ship
BBooks
Founder inventory
Pre-Algebra
Unknown — handwritten list only
$5.00+ $20 ship
BBooks
Founder inventory
A Universe from Nothing
Unknown — handwritten list only
$8.00+ $20 ship
BBooks
Founder inventory
A Concise History of Mathematics
Unknown — handwritten list only
$15.00+ $20 ship
BBooks
Founder inventory
History of Mathematics
Unknown — handwritten list only
$15.00+ $20 ship
BBooks
Founder inventory
12-Type Algebra Assessment — Collé
Unknown — handwritten list only
$3.00+ $20 ship
BBooks
Founder inventory
Financial-market microstructure reference set — four books
Mixed used-good and new; inspect
$45.00+ $20 ship
CCameras
Founder inventory
Logitech MX Brio 4K webcam — Black
Inspection required
$120.00+ $20 ship
CCollectibles
Founder inventoryCustom delivery
ChatGPT basketball signed by Sam Altman
Inspection required
$1,500.00inquiry
CCollectibles
Founder inventory
OpenAI × Work Louder Codex Micro
Inspection required
$325.00+ $20 ship
CCollectibles / apparel
Founder inventory
OpenAI Supply Co Blossom Socks
Inspection required
$25.00+ $20 ship
CComputers
Founder inventoryCustom delivery
Chrysalis — 16-inch MacBook Pro (2024)
Good / battery aged
$2,695.00inquiry
CComputers
Founder inventoryCustom delivery
Matrix — 14-inch MacBook Pro (2023)
Good / battery aged
$1,595.00inquiry
CComputers
Founder inventory
Nimbus — 16-inch MacBook Pro (2019)
Fair / service battery
$349.00+ $20 ship
CComputers
Founder inventory
UFO — 16-inch MacBook Pro (2019)
Good
$449.00+ $20 ship
DDisplays
Founder inventoryCustom delivery
Acer ED340CU 34-inch curved ultrawide monitor
Inspection required
$180.00inquiry
DDrone batteries
Founder inventoryCustom delivery
DJI Matrice 100 intelligent flight batteries
Inspection required
$60.00inquiry
DDrones
Founder inventoryCustom delivery
Configured DJI Matrice 100 aerial-compute package
Inspection required
$5,500.00inquiry
PPeripherals
Founder inventory
Logitech MX Master 4 mouse — Black
Inspection required
$85.00+ $20 ship
PPhones
Founder inventory
Google Pixel Fold 256 GB — Black, unlocked
Inspection required
$450.00+ $20 ship
PPhones
Founder inventory
PINE64 PinePhone — original model
Inspection required
$99.00+ $20 ship
PPower accessories
Founder inventory
Apple 60W USB-C Charge Cable — 1 m
Inspection required
$10.00+ $20 ship
PPower accessories
Founder inventory
mophie powerstation mini — Black
Inspection required
$18.00+ $20 ship
TTablets
Founder inventory
iPad mini (A17 Pro, 2024) with magnetic Apple Pencil
Inspection required
$425.00+ $20 ship
WWearable accessories
Founder inventory
Apple 42 mm Natural Milanese Loop
Inspection required
$60.00+ $20 ship
WWearables
Founder inventory
Apple Watch Series 11 Cellular 42 mm — Natural Titanium
Inspection required
$475.00+ $20 ship