Be very careful... trading accounts is illegal on this site and against most ToS agreements. Pretty sure you can lose your Amazon account as well for it.
I would do so. Now you aren't really allowed to trade the account itself but I don't see a problem with purchasing something with it and trading that out. Amazon does sell steam games and provides key codes.
amazon account with $22.00 Gift Card Balance
https://gyazo.com/1ea63fa782ead5bf192d00e67ade0cf8
paypal or skins