Selling random stuff you have isn't a job or real income, it's just liquidating what you have and have already used for the best price possible. No one's going to pay list price - they're looking for bargains, and unless these shoes are unique or special in some way, I'd guess the going price is far less than what you paid for them.

sell thrift store items for more than you got them for

Get work, any work, and you are guaranteed income

I'm selling some shoes on eBay and they all would match Up to 300$ but they ain't selling I'm tryin to get a job how can I get 300 mayb some idea of what I can sell on eBay???