Update:
I went and test drove the Blue 350z, and it was...... amazing.
The car is absolutely immaculant, and it gave me that little heart skip when I was in it driving. I'm sure it is the one! Unfortunately, the seller told me had another guy that was prepared to buy "today", but he would let me know. [I don't think he's using that as a selling tactic, because he told me he is in no rush to sell it] My Civic is doing well on Ebay, going strong at 12.5 and it ends tomorrow, and so we'll see.... I'm very anxious.