[quote name='Xo ColdKilla oX']Does gamestop sell used memory sticks?[/quote]
Please do not buy memory sticks from Gamestop, their prices are ridiculous.
In general, you should stick to online retailers for purchasing any kind of flash memory. B&M stores change their prices a lot less frequently and you can easily find better deals at sites like Amazon & Newegg (avoid ebay). Also, be extra careful that you buy memory stick pro duos and not memory stick pros or anything else.
These are the prices you should expect to pay for memory stick pro duos at this time:
1GB ~$12
2GB ~$25
4GB ~$40
8GB ~$75