Hey guys, I am a 3000GT VR-4 driver.  I'm good (by my own estimate) mechanically, have replaced everything in my car inc. engine, trans, turbochargers, front-mount IC, etc...  Running all Apex'i electronics...  Anyways, that's not the point of this post, just a little introduction. 
  
I am looking to buy a 260z with a 350 swapped into it.  This car was traded in during a multi-car deal.  It sat inside at a dealership all winter and recently got bought by another dealership.  This is what I know about it, after tracking down the guy that built it and traded it in: 
  
-It was purchased as a rolling chassis out of Missouri.  Almost no rust that he can recall. 
-Engine bought at a race auction, was in very good condition, but he doesn't know much about the internals. 
-It is tubbed, but not all the way, still has original gas tank (mini-tubbed, right?) 
-Ford 9" rear end 
-Holley 4-barrel, unsure on CFM 
-Auto trans came with engine 
-5 bolt on the rear wheels, unsure of front, forgot to write that down 
-Forgot to look @ brakes, d'oh 
-Roll bar, nothing special 
-Interior is STRIPPED, no windows either 
-Body has original paint, he thought, it is actually in pretty awesome condition on the outside 
-Original suspension gone, he put coilovers in there (I think, phone was cutting out) 
-Hurst shifter 
-Exhaust is a hack job, tips sit about an inch in front of rear tires on both sides.  Looks cool, I guess, but I'd probably move it. 
-Has a Mustang-looking front bumper.  I kinda like it, that's what drew me to the car. 
  
I did drive it, it's got some pickup to it.  On deceleration it backfires pretty good.  I would like to put a blower on it.  I know that they are a whole different beast than turbo's, but hey, I can learn. 
  
They want $5500.  It appraised for $7500 but I DO NOT TRUST the appraiser.  Seemed very shady, said interior was in "good" condition.  It's stripped out completely, dash gauges don't work, and there are no windows for Pete's sake!!!!! 
  
Anyways, I don't have a clue what I should be asking for, but I was going to start @ $3500 see how good I can yank them.  At what point should I call it quits and move on?  I really appreciate any help you guys can give.  I know as far as 3000GT's go, when you put money into them you drive down the value of the car FAST.  Can post pics, but the only ones I have are exterior, which is actually very nice.  I hope I have given enough info.