
Prototyping prices and deals
UponSale tracks 265 products in this category across 230 offers from 8 stores.


Sparkfun LED Tactile Button – Green

Sparkfun RJ11 6-Pin Connector

Adafruit Stacking Header for Raspberry Pi – 2×20 Extra Tall Header

Adafruit Perma-Proto Half-sized Breadboard PCB – Single

Adafruit Perma-Proto Mint Tin Size Breadboard PCB

Adafruit Flora RGB Smart NeoPixel version 2 – Pack of 4

Adafruit 16 MHz Crystal 20pF capacitors

Adafruit 4 MHz Crystal 20pF capacitors

Adafruit PiGrrl Zero Custom Gamepad PCB

Sparkfun Metal Pushbutton – Latching (16mm, Green)

Adafruit Linear Ball Bearing – 8mm diameter – LM8UU

Adafruit On-On Alternating Power Button / Pushbutton 3-Way Toggle Switch

Adafruit FeatherWing Proto – Prototyping Add-on For All Feather Boards

SparkFun Solder-able Breadboard – Large

Adafruit 36-pin 0.1″ Female header – pack of 5!

Adafruit Sewable CR2032 Battery Holder

Adafruit Small Plastic Project Enclosure – Weatherproof with Clear Top

SparkFun Safety Glasses

Sparkfun Latch Terminals – 5mm Pitch (3-Pin)

Adafruit Mini Solderless Breadboard - 4x4 Points

Bare Conductive Light Up Board

Sparkfun LED Tactile Button- White

SparkFun Electronics Theragrip Thermal Tape
How we read this category
Every figure above comes from prices we observed ourselves on retailers’ public product data. A “real drop” means today’s best verified price is below the median we recorded for that product over the last 90 days — not that a store put a sale badge on it.
0 of the 265 products here currently meet our quality bar for search indexing. The rest stay visible to you but are excluded from search engines until they have enough verified offers and history to be genuinely useful.
How we calculate this
Where prices come from. We read the product data each retailer publishes on its own site, unhurriedly and within the rules that retailer sets. We never work around an access control and we never buy collected data of uncertain provenance.
What “verified” means. An offer can win best price only if it is inside our freshness window, matched to the exact variant, in stock, and free of an unresolved price anomaly. “Best verified price” means lowest among the fresh offers we track — not the lowest price on the internet.
How history works. Every price we observe is stored with its source and timestamp. Daily market low, median and high come from those observations, so the price history on this page is ours, not a retailer’s claim.
What we exclude. Stale offers, mismatched variants, bundles compared against single items, and prices that move implausibly without corroboration from another store.
Images. Product photographs come from the retailer they sit beside, loaded from their own image host. We do not re-host them and claim no rights in them.