Can i get money for my iphone 3gs?

I have an oldish white 16GB Iphone 3gs, i have recently replaced the screen, everything works perfectly fine. It is a tiny bit scratched up on the back, but i have quite large stubby fingers and i can't use it easily, i just want to know if there's any shop in South Australia that i can get money for it, any help will be greatly appreciated. Not for store credit though, for actual money so i can buy a different phone

I have the same phone but anyways. You should sell it on craigslist or at a pawn shop.