Eric Forman has a large collection of G.I. Joe figures and has stubbornly refused to give them up over the years. Red never liked then and refered to them as "those dolls" whenever they came up in conversation. From Red's comment that the G.I. Joes lost the "Dumpster War of 1979", which is one of the things he says to Eric when Kitty sends him a tape of them and his friends to Africa, it is safe to assume Red threw them out. This incident appears in the season 8 episode Bohemian Rhapsody.
Mitch Miller also collects G.I. Joes.