[V8] Automatic transmission value

[radek at uniserve.com]

Hello all;

I have someone interested in my spare auto transmission that comes  
from a 1990 with only 30k on it (and that's kilometers).  Any idea  
what I should get for it?  I'm asking for any guidance I can get, and  
I'm not greedy, BTW.  Just wanting to get fair value.
TIA

Radek.
91 V8Q 5-sp