
Modular prices and deals
UponSale tracks 1,306 products in this category across 1,540 offers from 14 stores.


ControlByWeb Eight Digital Input Expansion Module

ControlByWeb Dual High-Power Relay Expansion Module

ControlByWeb 4 Relay, 4 Input Expansion Module

ControlByWeb X-400 Web-Enabled Modular I/O Controller

ControlByWeb Eight Analog Input Expansion Module

ControlByWeb 6 Relay, 6 Digital Input Expansion Module
Intellijel Rubicon v1 (Used)

WMD SSF Tool-Box (Used)

Make Noise Modular LxD Low Strike Duo Filter & VCA (Used)

thorn.audio Splines Black

thorn.audio Splines Silver

Erica Synths LXR Drum Module (Used)

Steady State Fate Ultra Random Analog (Used)

Endorphin.es Milky Way 1U (Used)

Cre8Audio Chipz (Used)

Magpie Modular nRings (Used)

Erica Synths Pico VCO2 (Used)

After Later Audio Send VCA

After Later Audio Inserts

Tiptop Audio Z2040 Voltage Controlled Lowpass Filter, silver, mint condition

Endorphin.es Ghost Module - Silver (Used)

Intellijel Aux Mix 1U (Used)

ControlByWeb X-600M Web-Enabled Modular I/O Controller
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 1306 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.