Hey, sorry for the late reply.
Ummm..... well....
Here is what I noticed.
1. There doesn't seem to be a kick harness.
2. The DVD drive had been replaced.
3. Not even sure if it even has a game.
Dvd drives have been known to go out on the 246 systems, and from what I've read. The 246's only work with certain ones. Some where on these forums it talks about it, and apparently this seller replaced it. But who knows what is really going on with this game since there is no proof it really works, or even has a game in the drive. It has a security dongle (the mini pcb board) with all the wires except for the kick harness. It also has the memory card. with Tekken 4 vers. D (the latest revision)
If it were me man..... I would pass on this. Tekken 4's show up on ebay quite a bit, and for the price he is asking, you can get a FULL blown kit and have it shown working. In fact do some searches on this site. I think I saw 1 or 2 for sale on here, and one went or was selling for $160 shipped. Post a WTB: NAMCO 246 Tekken PCB KIT.
I got just about everything a couple years ago for a bit cheaper, with free shipping. And the seller showed pics, and didn't have "I wash my hands to stay clear" attitude.
Here is some more indepth info.
http://guru.mameworld.info/system246/index.html
http://forums.arcade-museum.com/showthread.php?t=201369