Schaffer's seems still to be pretty active, judging by their Facebook page:
https://www.facebook.com/shafferstradingcards/
Must disagree on whether the place is easy to reach. Maybe so, if you've already been there and
know exactly where it is. If all you have is the general location, you shoot right past it at 70mph
looking for a shop located sanely on the right. Even if you're looking for a store in the median,
the only sign is right at the driveway, so you fly right past it anyway. Somewhere between
"charmingly eccentric" and "damned infuriating"... you make the call...