Hey its a T3 flanged standard turbo off a R33 or 34 skyline, i dont think that it would be BB just a fresh brush bearing i would say.
they are a good turbo and with good supporting mods can see up to 200RWKW on a skyline but run out of puff after that they are basically the equivilent to the T28 of the T2 flanged turbos, hard to tell if its steel or ceramic wheel from the picture but looks like a ceramic. The ceramic wheels dont like to be pushed past 12psi or you risk turbine failure, and basically the rear wheel drops off and smashs to peices and you end up with it all through your exhaust.
for a clean example you should get anywhere from $150-300 for one.
Cheers hope that helps
