So I went an looked at it. Pre-tty nice cab. Apparently, the guy bought it two years ago for $400 (for his daughters, which I'm guessing are under ten because he was born after Mappy came out, but they lost interest) from a neighbor who was moving and looking to get rid of this one. They had other games, which they kept.
Monitor was a little dim, but there was some leeway in the pot and it brightened up pretty nice. Otherwise, perfect or close to perfect picture. Original, I think. Sound was good.
Bezel was almost perfect, no discoloration. The CP had what appeared to be some light burns, but mostly on the 2P button, and mild at that. Marquee was at least 98%. Side art wasn't great, perhaps 50% left on each side. The inside was a little dusty, but all components looked good. Even had the manuals inside what appeared to be the original flap mounted inside the back panel.
I decided to jump on it, but didn't have a truck with me and hadn't brought money. He said he'd hold it for me till tomorrow afternoon. Going $250.