FWIW, I paid $200 last year for a working Pac converted to a Ms. Pac. It had substantial screen burn but I already had a new 19" monitor to slip in there.
Pac-Man cabinets are always screaming for help. They're made of plywood so the graphics peel away. It'll have wear along the front where people (for some reason) hang on for dear life with the unused hand. The kick panel will have most of the screened paint peeling off.
Restoring a Pac cabinet is a daunting task--I figure I spent 200 hours fixing mine via tedious hand painting. Many people opt out of that torture and apply full-coverage vinyl graphics. Even then, there's a lot of cabinet prep work needed to get a flat, clean surface. Usually, the vinyl overlays don't have the blue spatter, but I actually prefer mine spatter free.
A new PCB isn't necessary to convert it back from a Ms. Pac to an original Pac... you just need the Pac-Man ROM chips. Swap those then disconnect the satellite board. Pull the Z80 chip out of the satellite board and plug it into the socket on the PCB where the ribbon cable connected.