Looks very clean, hard to tell from far away pics though. Also, hard to tell if there truly is "no rust" when they recently covered up all the metal with new paint.
Looks like a clean Z though, and if it checks out up on the lift I think it is very well priced. Here in California if you find a rust free, clean, running Z in that shape you're going to pay closer to 10K. Just the market for them here right now.