ultimately, as with all Zeds, no matter what price point they are advertised at, it's difficult to make an assessment from a few photos. Nothing will beat actually looking at the car in question, and/or talking in detail to someone who knows it in real life.
Unless it's obviously a bloody good deal worth taking a chance on (remember that orange project car a few weeks ago for 4.5k?!), one needs to look at the thing and inform one's opinion that way.
The tried and tested advice for new S30 buyers is educate yourself via the internet but also hook up with some current owners, at shows, local meets etc., and get to look at the cars. This will help build up an idea of the range of quality, values, what to look out for, ideas on how much work would cost to fix specific issues, etc.
I personally think that blue car looks pretty good. I'd be looking to see what damage had been done by the brake fluid leak mentioned (probably will need some inner wing repainting to do a decent job). There's no mention of rust but I'd be investigating all the usual risk areas to check if there was any sign of anything and if so, how pressing that would be. It may be worth the money, but again, looking at the thing up close will shape a final view on that if factoring in any work that needs to be done.
Duncan (Z Farm) may still know this car too, so might have an informed view based on it being his handiwork.
Incidentally, there's another 240z on now for 12.5k. More original (I.e. L24) in spec - has the same issues as the blue one though, paint marked by brake fluid! People should use silicone fluid then they wouldn't have that problem!
also mentions "no visible rust". Which is fine - but it's the rust you can't see immediately that bites you in the wallet later!
http://www.ebay.co.uk/itm/Datsun-24...005&prg=9421&rk=2&rkt=6&sd=151372917579&rt=nc
Edit: that red one also has a sunroof I notice (which for the reference Madda, knocks off some value).
