I've been offered $250 for my 8 3/4, mainly to replace a 9 1/4 I think, lol. The front D44 is a pain in the azz since it is drum brake and virtually no one wants it unless they need one for a truck that has a broken D44 of the same type. The 3.91 are an odd ratio but is probably more desirable then the rest of the axle. Someone will want that 8 3/4 and the gears out of the 44, just look around or put it on Ebay. Should be able to get $150 - $250, maybe a little more.