i used to be a powerseller on ebay a couple years back.

i still have a huge stack of vintage computers ( nintendo, commodore, msx, spectrum zx, atari, sega etc. etc. )
also skateboards, vintage clothing, records, books and much more.

i'm not a website dev, gave up on that a long time ago.
but if we can manage to find a way and build a website where we can sell our used items that are just laying in the basement
 for usde only, and provide a simple link to where they can buy usde, we could all benefit.