I remember hearing a story about how someone grabbed a copy of EB for like, $3.50 at their local pawn shop or something like that.
(Now makes me look in the SNES section of retro game stores frantically. You never know...! >_>

Not EB, but I also recall PlayAsia selling Mother 3 for $15 back in like, 2007. It's going for about $50-70 now, which isn't as bad as EB but still. ;_;