Wow, they must have hadall their shit donated to them by some people who just wanted to get rid of non working stuff :\ Even finicky systems aren't that bad...
What it tends to be is parents clearing out their Kids stuff that they left behind. Some carts will work but its very rare as most people will take known working ones to either of the 2 Stores around here that give good money for older games. I make an example of my copy of Sonic the Hedgehog 1. Systems dont usaully turn up but when they do they are tested before they are sold, and at that its often rather dog eared examples as people again will take it to the stores that will give good money. And also by test the machine I mean just plug it in at the wall, somthing that GS didnt do when they sold us a SMS once.