well, for the most part, he will be sitting on that for a while...
just for the bearing shaft and seals, will run you about 75.00.....prices will vary....
now to go onto a parts website, its sold already assembled, outter tub and all....to a price close to 314.00...as noted part number 11....
he will be lucky to get 200.00 if it was working.....in any case, 'broken' is just scrap value, about 5.00.....you can offer him 25.00 to 50.00, I wouldn't go any further than that....even that is on the high side....
better yet, offer him the asking 100.00....but that HE supplies the parts and that you will rebuild it yourself.....willing to bet, he knows what it cost, that's why most are trying to get as much out of them as possible....
honesty, nothing to rebuilding one of these.....check out youtube, there are step by step videos of how to do this procedure.....I was able to do it under an hour...
this unit was built Sept 2010....looks newer
http://www.searspartsdirect.com/mod...odelSearch&q=MVWB750WQ1&searchTerm=MVWB750WQ1