attention 8 3/4" gurus

I have located a 8 3/4" 741 case out of a 68 b-body. Drum to drum, open carrier, gear ratio unknown. Guy is asking $150. Does that sound like a good price? Looking for a wider rear to put under my 73 Duster. I would prefer 66-67 as they are slightly narrower, but if the price is right, this one might do. Pinion seal area is pretty grungy looking in the pic I have but it's also obvious that it hasn't been pressure washed or blasted to try to hide anything. Thanks.