Quoted from Edster:
I might be getting a nice Pro soon. Is there anything I should be looking at? Known issues? I've played a Premium and really like the hammer, too bad this doesn't have it...
It seems that the big wear area on any MET (pro or premium) is going to be Sparky himself, the Sparky magnet and the playfield around the sparky magnet. Those three ares will be in worse condition if the previous owner had never installed a mylar circle around the magnet and also the extended Sparky plastic protector. Also check the normal stuff like, shooter lane wear, mystery scoop, center drain wear, broken plastics etc etc. But I would focus on the sparky area.
Also out of curiosity, is it an original PRO (square hole speakers), or a new PRO LED (round hole speakers with graphic)?