I'm going to be honest here with the R33, not because it had crossed my mind to buy, but Ive looked at a few now.
My friend bought his 94 that has been repainted in GTR purple, 18's, adjustable teins, full exhaust, big FMIC, 400r body kit and a mild sound system for $8500 with roughly 115,000 - 120,00kays. To date it's only needed a turbo to manifold gasket.
I'm going to look at a forced sale R33 maybe next week, he wants $8300, but I know I can get it for $7k. Although it needs paint in a few area's.
I think your R33 to sell is a $9,000 - $10k car. I think it'll be hard pressed to get much more. I've seen a few SII's come up for low teens now..
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Your R32 on the other hand.
My mate paid $18k for JapTaxis built rb26/R32 gtst. And your car has ALOT more on it in terms of a total package. I can buy my old R32 back for $23k, so anything in the middle of those two price's.