Do explain why your offer makes financial sense for the seller. For example, if you're able to afford a larger down payment, mention it here.Focus on three things: State your intentions, show that you have the financial means to make the purchase and make a personal appeal to the seller. What is in an Offer? We're talking about how to write an offer to purchase a home all right so how do you structure your offer to make sure that the seller accepts it. Here are house offer letter samples to win a bidding war. 3 examples to use as a reference point. Learn how to write a house offer letter that will be sure to make you stand out from the competition. If you're struggling to get an accepted offer, I highly suggest taking the time to write a letter to the seller. They must sign the purchase and sale agreement in order to be an accepted and binding contract.