The Z market is very specific - the number of potentiel clients who want one is limited also - that's what makes us special ! If you want a known item, buy a 911, if you want a cheap to run,easy to find parts, buy an MG etc, etc
If you want a Z, then travel, visit, see, touch, feel, smell etc as many as you can - I agree with Derek - go up and make a w/e of it ! Essex boys, maybe go and get a Capri !!!
If your budget is nearer 8 grand, don't p*** about with one at half that price - it'll cost you much, much more !