Most of the machines I have seen billed as “fully shopped” have only had what I consider to be a used car lot detail job. Replace the obvious, clean the readily visible, and then post up for sale. I won’t even start on the “fully restored” side. Very few people do what I consider a real shop job. One place I know for sure that does a “full shop” job is Elkhart Pinball. I’ve been to his shop personally, and he is the real deal. Hemi orange also makes sure all his used games are in tip top shape as well. There are a few others lurking around, but these are the only ones I have been to and bought from personally.