[Zeke]

Tricky question. The easy answer is no. But how can you demonstrate the quality of the bikes? A prepurchase inspection at a dealer or shop will go a long ways in selling with no rides.
Another easy answer is, well, 2 bikes — just trade them in on the one and be done with the worries. Selling any motor vehicle can be somewhat intimidating and complicated.

You mentioned theft. If you copy a prospective buyer's DL with endorsement and his insurance policy, you will be on the safe side. 2 bikes, ride the other one until one is sold.

Then there's consignment. Too many answers.