Kevin is correct. While I have seen Red Tents that have been converted to Playchoice-10 machines, they were originally Nintendo VS cabinets (VS Excitebike, VS Super Mario Bros, VS RBI Baseball, etc). Ugly as sin, but they have a following. That is a good price for the cab and those games frankly.
Remember: Nintendo Playchoice = N.E.S. on timer. No difference in gameplay, graphics, sound, etc.
Nintendo VS = An authentic Nintendo arcade system. Graphics tend to be a TAD bit better than the N.E.S., gameplay is different (SMB is much harder), no timer, and it's tweaked to be more "arcade like" (ie: you're not going to sit there and play any of the games for a long time unless you're good).