Here is one I have used -- I got it from my ex-wife, who is a lawyer. If you like it I could email the word document, it looks much better...
BILL OF SALE
In consideration of $_6,000.00_, the receipt of which is hereby acknowledged, I, Joe Schmoe (the “Seller”), do hereby bargain, sell and deliver unto Dick Weed (the "Purchaser"), one 2005 Ski-Doo Summit VIN #2BPSZZ5A95V999999.
I vouch to be the true and lawful owner of said vehicle and have full power, right and lawful authority to dispose of said vehicle. This vehicle is free and clear of all liens and encumbrances.
The purchase of said vehicle by the Purchaser is made without any expressed or implied warranty or guarantee of any kind and said vehicle is sold "as is".
Date: January 25, 2005 ________________________________
Joe Schmoe