> > Also, I don't know how big these got in the US (I'm assuming pretty >>common),but one thing Canada had an abundance of was the '7-in-1', >>'50-in-1', '150-in-1'multicarts for NES.

No they are quite rare. I've never seen any in the wild. Mult-carts are cool at first but they start to get boring when you find out that they all contain pretty much the same games. Pirate originals on the other hand...