I recently purchased a used amp (Markbass) from GC. They offer a 1 yr. $40 and 2 yr. $72 extended warranty (all cost included). My past experience (not with GC) with extended warranties is that they are not worth the paper they are written on. Has anyone had any experience with GC (good or bad) with their extended warranty (used equipment). I have a 30 day return option and 30 days to decide on the warranty. Any experience with this out there? Thanks!