Read my thread on this. It took every bit of 45 days to transfer mine despite the original lessee and I doing everything in record time. Private Transfers: What's the paperwork holdup from the finance companies?!
One of the guys who replied in there took 60+ days.
Honestly, it would have to be an amazing deal from/to someone I trust to go through this again. The part that should have taken 48 hours (finalizing the 7 pieces of paper) took their 3rd party 30 days to mail to me.