I recently decided to do the same thing, with negs (35mm and 120) and with a load of old 35mm trannys too !
I used an Epson scanner, can't remember the model, but I can look when I get home.
I bought the scanner just to do the job, as it worked out cheaper to buy it, and re-sell it after the I had finished scanning, (although I decided to hang on to it just in case I need it in the future!)
Obviously it isn't a mega quick scanner, but I can scan 4 x 35mm at once, and just did a few a day whilst I had nothing better to do. I soon worked my way through them.
When I priced up how much it was to send them off to be scanned, it worked out a lot cheaper doing it myself, and the quality is perfectly good enough for my uses.