e32 is less expensive by quite a bit and has less free play in the pedal are the noticeable differences
actually 146 is an old price an needs to be updated and would be a steal, az is at 179.00 , My price for new on that part is 157 and for the e32 master is 125
I have a like new used e32 master cylinder, stored in a ziploc since I removed it. I had mushy brakes and I thought the master was bad. Swapped in a brand new one, and they felt exactly the same, so the old one wasn't the problem. It actually looked very clean and new, so I'm guessing the PO replaced it shortly before I bought the car. The old e28 one was in the trunk.