I just ran into a yellow 1200 in 1 Famicom cartridge, and couldn't find any info about it. I'm console-less right now. Any good games included? What do these sell for typically?

Welcome to the forums, have you got a pic of the cart? These would fetch between 15$-50$ on eBay depending which state it's in. Usually the biogger multi (higher then 50 games) contain alot doubles. I think it contains the same games as the NES pirate 1200-1 but dunno for sure though.