Owner vacated the property but left personal items

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Bought a property at FC auction at the court house and recorded the deed. Previous owner has vacated the property as agreed . However, he has left behind furniture, tools and kitchenware etc behind. The locks have been changed to the house. I have sent him text text message to let him know that I would be disposing the items and in case he need access inside to pick anything before I dispose, to please let me know so that I can arrange access inside the house. He has not been responding to my texts. How long I should wait before I dispose (salvation army) or take the items to the local dump?