Matco, for some reason, is much more popular in some areas and virtually non-existent in others. I think this has something to do with the fact Matco hasn't been around nearly as long as the other 3 major tool truck providers. For example, I had an Uncle who worked at a major paper mill between Cincinnati and Dayton. They got a weekly visit from the Mac, Snap-On and Cornwell dealers, but not from Matco. In fact, he had never heard of Matco, let alone seen one of their trucks until I told him about them myself. If you're in an area where Matco doesn't have much dealer presence, you might be able to pick some up for very cheaply-more cheaply than it really should bring. The other side of that coin is if you're trying to sell Matco in an area where it isn't very well known, you're going to have trouble getting a fair price.
Around where I live, SK/Proto/Armstrong are not very well known. So when you see any at the local pawn shop or flea market, they usually bring LESS than C'man. Because the dumb, SOB selling the stuff just KNOWS that C'man is top of the line-and charges less for the "no name stuff".
As to what areas Matco has a strong dealer presence in and thus is well-known, I can't give you an answer there. In my hometown, I think we have more Matco dealers than any of the other 3 trucks, but I'm not positive.
Beerman