The coupons are only good for processing cards to be added to the site by first time sellers. They do not cover buying cards nor do they cover shipping costs. Hope this helps! The coupon is a nice jump start for a new seller.
Concentrating on my personal collection. Please drop me a PM if you have any of the following for sale: Topps Football 1959; 1961-1964, 1967; Philadelphia Football 1964-1967, Topps Baseball 1957-1968