When I sold my old truck to my friend, he gave me cash plus a Detroit locker. Initially my plan was to put it in my crewcab till I discovered it already has a tru-trac. So before I try to sell this thing, I thought I'd see if anybody had any ideas on how much they go for used. This is the original Detroit locker, came out of an 06 f250, has approx 10,000mi, still has the bearings pressed in on either side. It had 4.33s for gears or something like that. I know how much they are new, but no clue used. What do you guys think?