Vehicle Sale Template Need A Purchase Agreement Template For A Vehicle That Is Listed On Ebay.?

Need a purchase agreement template for a vehicle that is listed on ebay.? - vehicle sale template

Tomorrow I will try a car on eBay. If all goes well, I'll pay the seller a deposit for negotiating the purchase price.
I shot my deposit and the purchase price by an agreement, so that the seller is not in my car and the sale of the vehicle to someone else on ebay.
Is there an agreement of sale of models available that you could help me. I do not have online seems to protect myself in this situation.
Thank you in advance for your help ...