Earl Stewart of Earl Stewart Toyota, North Palm Beach, FL, recently repurchased a 2010 Toyota Prius from a customer for more than they originally paid. Purchased used for $20,500, the owners drove it 26,000 miles before selling back to the dealer for $22,000. The supply level for Prius models has bounced in the 10-day range and possibly as low as 4 days. Dealers normally operate with a 60-90 day inventory.