Call your county auditor and/or tax office and see whether it’s been handed over for unpaid bills. In our county, it’s often possible to buy those for back taxes. Most of the time, if you’d just like to go through the stuff, the assessor will meet you (or have a cop do it) so it’s all legit. We had a rough-looking but sound estate house (new roof, even!) abandoned in our neighborhood. New owners rebuilt the house, but found several thousand dollars’ worth of furniture, China, etc. the heirs had’t even bothered to look at.