Mailing Directly to an Owner (Vacant Property)

So I have found 3 properties in my area that are vacant, 2 of which seem to have been vacant and uncared for years. I have done some digging and have found who is in charge of the estate/owner of the property and their mailing address. Does anyone have any tips or suggestions on how to word a letter to this person if I am trying to find more information on the house and possibly purchase the property? Thank you!