Letting Neighbor Know We Want to Buy His House

[Account Closed]

Our neighbor spends very limited time at his house, only coming once or twice a week to mow the yard or take out the garbage.  We're wondering if he may be getting ready to place it on the market, or if not, may be interested in selling it.  We're thinking about writing him a letter to express our interest in buying it should he ever wish to sell.  Does anyone know of a good letter "form" for doing this?  Preferably a form that has had success in the past!

Thanks in advance!