Yes you may list a used piece if its ABSOLUTELY CLEAN!. please clean it on list it!
you can have your buyers pay you with a credit card MO or western union. if you have your own credit card merchant account you may use that
Good question, while in beta mode you will need to make a new account to use the marketplace. after the beta period is over you will have only 1 login and 1 user page that will have all your glassQ.com member info.
Well, during beta testing all the services are free. we will let you now ahead of time before we go into production launch. after that you will need to become a premium member on glassQ.com.