I'm selling a set of ROTA Boost wheels in 18X9 +30 and 18X10 +35. The fronts are new and never had tires mounted. The rears have 300mi on them. They are Hyper Black and I am asking $800 shipped for the 4 wheels.
Check out
http://www.wheeldude.com and look at the ROTA wheels for the 350Z. Just look at the 18X9 and 18X10 models. Find something you like. They are good cheap wheels and come in under your budget.