stevenbmatthews2

3 listings we've seen · as of 6 Oct 2026. This is the maker name shown on the store, not proof of who owns the company.

Tools

Deterministic fee calculator, net payout, and sudden-death auction floor tool for Whatnot sellers.

Developer Tools

Deterministic spot pricing, fee auditing, and weighted tier allocations for live card breakers.

Shopping

Deterministic net payout, TCGplayer Direct fee auditing, and envelope shipping margin calculator for single card sellers.