do some reserch on the diffrent models of FCs that are out there..
If you are looking for a n/a model (non turbo)

I would look into the S4 86-88 GXL,
Heres why,and I like them cause of this..
They have power windows.. im lazy to slide over to roll down windows..
They all came with LSD..

Its the SAME n/a 13b that came in all the S4,dont let no one bullshit you on diffrent models being better..
Heres the models to look for..
SE
SPORT
GXL
GTU

then
Turbo II
10th Anniversarry Turbo II

I really doubt you will find one for $1500. but its possible,and dont waste you rmoney on a SE model