My father's negatives were lost for 72 years (He died at 29, when I was three). They were found and returned to me recently (about 2 1/2 years ago). There were 220 rolls of 16 per roll (B&W 645 format). My Polaroid 120 Sprintscan died during Hurricane Sandy, being subjected to 6 months of freezing temperatures. I found on ebay a Nikon 8000 medium format film scanner, WITH THE HARD TO FIND ROLL FILM GLASS CARRIER! I purchased it, and before I scanned my first negative, I sat on the carrier and broke the glass! Fortunately I found a guy whose company makes thin precisely made replacement glass, both the bottom piece and top piece. The top piece is special anti-Newton glass. His prices were reasonable. Saved the day. Since Nikon no longer supports the 8000, I use Vuescan, and I must say, it performs a wonderful job. It is capable of multi passes and exposures. I have made some big prints from my father's negatives. I agree with Mark 100%, there are few good scanners out there. I forget what I paid for my used 8000, but probably more than what it cost when new.
Good luck
Dave in NJ