Built 904 Transmission

Selling a transmission assembled with high dollar parts to someone you don't know is going to be tough. How would a potential buyer know what he or she is getting? Because of that, you'll likely get pennies on the dollar unfortunately unless you decide to take it apart and sell it unassembled or part by part.
sheet, you'd prolly get the same coin selling off the tasty bits as rolling the whole unit with the only difference being your labor to blow it apart, dealing with yahoos and shipping and then being left with the carcass that you'll stub your toe on for a year and half before getting pissed enough to scrap it.

(note: immediately after scrapping it somebody will want/need the case and pay good money)