StockX is one of a good example of an app that lets sneaker fans sell or buys sneakers but they are only accepting cards.
I don't expect you to buy sneakers everyday. So if you won't find the marketplace suitable to your needs, you can always use the one you have mentioned as example [StockX] by asking someone to buy it with his card, deliver it to you, then you pay it in cryptos. This is ultimately possible by using one of trusted escrows to make the deal with the one who will buy the product for you, and of course this would cost you extra money to pay the full service.
I guess some platforms offer this service for no-card users, but it's always safe by using a real person escrow with a good reputation confirmed by community.