How to fill out the Mobile and Manufactured Home Purchase Agreement and Sales Contract? Specifically crafted for mobile home transactions, this template outlines the terms, conditions, and responsibilities for both buyers and sellers.1. Enter the date of the agreement. A mobile home bill of sale is used to prove the legal sale and purchase of a mobile home between a buyer and seller. An agreement between the Manufactured Home purchaser and the retailer or dealer from whom the Manufactured Home is purchased. Let's go over the process for buying a mobile home, what to include in the bill of sale and where to get an official template. It can be used to record the sale of new or used mobile homes with the cost of transportation or lease transfer to be negotiated in a separate document.