Here are house offer letter samples to win a bidding war. 3 examples to use as a reference point.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. We've put together a few tips on how to write a letter to new home buyers as a seller so the house that was yours can welcome them right. Learn how to write a house offer letter that will be sure to make you stand out from the competition. Step 1: Initial Details. A welcome letter and listing of all services available to new Ohio REALTOR members. This letter offers a general description of the proposed transaction, including the desired financial terms and completion dates.