Collectors don't like to buy used sneakers, unless they are extremely rare and only lightly used.
Also, one size definitely does not fit all.
This isn't like pawning jewelry, rare coins, or crystalware.
This business is really a poorly-secured payday lending shop.
I’m presuming he will ensure the shoes are fit for sale, but there would be a market for somebody to want to buy two year old Jordan shoes, that originally sold for $200, for $60.