The year will probably hurt the price a bit, being the very first of the 33's. I know it's been rebuilt, but that's only the engine.
I got what I consider a decent price for my car, (http://www.skylinesaustralia.com/forums/19...ts-t274145.html), but I also wasn't in any hurry to sell.
The thing with cars, 33's in particular, is that people see junk examples going for 10k and even less than that, and expect to get every 33 for the same price. If you find a buyer who isn't a moron, you won't have to deal with people expecting to get something for nothing.