Heres what I would look for
1994 Vspec
Grade 4+ (Straight body, clean interior with maybe some aftermarket 18's, pods, zaust etc...)
Minimal to No mods (especially no boost controller)
<100,000kms (preferably lower than 80k)
Pay $21-$23k
Like this one (22,000kms...bollocks!): http://www.j-spec.com.au/list/index.php?ID=8554 . But it has a few mods that I would do differently.
The first signs of getting dicked around by the sellers, jump out!