lots.....
would be cheaper for somone who builds turbos cough* me *cough to have new bearing housing, 360 kit, shaft and exhaust housing....
due to the fact a fully built one are mega money, and youd save a few quid as you still have comp wheel, housing, and back plate,...
all of which are very dear to buy seperately, which obviously drives up the price of a full unit.....
but will get a price for new unit, soon....
carl