Yeah, the Kill Screen guy is clearly a collector, but overall they are always nice in the store. They are less willing to negotiate, but they are reasonable on the lower end games as well as having decent prices on parts/repair machines.
ASIDE
Asbury Park is worth visiting for any retro freaks out there BTW. Besides Kill screen, the silverball muesuem is a pinball museum which is pretty great and has a few cabs. they have a great selection of bars/restaurants on top of it. (and 3 micro breweries)
ASIDE ASIDE
If anyone else is interested in cool Retro/Current gaming on the shore,
Redbank and Jersey City have Yestercade. A mash up of a bar with a little mini Con play area. featuring a bunch of cabs and older to newer consoles to play.
Linkys just in case you want em':
http://silverballmuseum.com/http://www.yestercades.com/https://www.facebook.com/killscree