@Braddo
When you buy a new car do you assume it's never been used before? When you buy a pair of jeans you do assume they've never been worn? Haven't you ever taken a car for a test drive? Haven't you ever tried on a pair of jeans in a store? Do you think the seller discards these items when you've tried them rather than selling them to someone else? Do you say, "Hey, I saw that other guy trying these jeans. I want 50% off!"?
As for Amiga hardware I wouldn't buy something unless the seller had tested that it actually worked.