I have bought a few off pinside in the last year or two, but find pinside to be a pain when selling. Have a lot better luck with facebook groups and some with craigslist. Oddly enough I have had a number of instances where I sold/traded to someone using one of those sites and the person turns out to be a pinsider who never saw my ad on here.

I also list on Mr pinball and Klov, but have near zero luck with those sites. People who contact me off mr pinball almost always are retailers. KLOV is not geared toward pinball and while I get interest, distance is usually the problem.

I think you are over estimating pinside's viability as a selling platform. I have 4 ads for games on here. There are just the ones I made ads for and the number of machines I have gone through going back to november 2015 is probably triple that.

STTNG - Traded for a BTTF + cash. Guy found me via CL.
NBA FB - Traded for a flinstones off cl. Incidentally traded for a Black Rose which is how I met colin on here, but he found me off klov or Cl and not here.
BF - Traded for a RBION off CL.
Diner - Sold off CL.