E-Commerce with Store Credit

So this particular client brief is interesting - Basically a swap-shop where somebody can upload their garments to the service, have it reviewed and valued by a moderator, then the moderator can apply credit to a users account to spend in the shop.

I’m thinking Webflow E-com/Airtable/Memberstack for the upload? but as far as the credits go, I’m stumped…

Please please please if you have any ideas how I can get this working I’d love to hear (read) them!