Maybe they sell the things after a certain time / when it's worn out or so. But I'm not sure if this is still want you want. Renting a full costume depends on type, motif, amount of pieces... I remember it started by 50 bucks for one day (return next day) for simple things (monk's robe) and went up to 120 bucks for superman, spiderman and a few hundred bucks for Star Wars. Your wings could be about 30-50 bucks for next day return. But check for yourself, Google could help.