MiddlemanHub helps resellers find verified US suppliers and list their products on eBay and Depop in one click. Paste a supplier link (Alibaba, AliExpress, Amazon, Shein) and it builds the listing with photos, sizes, pricing and a clean description, then publishes to eBay or exports a Depop bulk CSV. It also includes an AI background changer, a profit and fee calculator, and a Stock Watchdog that pauses eBay listings when a supplier sells out and restores them on restock.