Sorry to hear about your dc5, was it a type r?
The 350z are great motors, with lots going for them. The price always reflects history and overall condition. You could buy an average mileage 05 GT for 6k and over the course of 6-12 months cost 1.5k in repairs ie clutch, tyres, battery, brakes and suspension etc. or and spend 7k and not end up spending for the above as its been replaced recently - the joys of used car buying.
David