What can be done on property stored for 7 months and can't get the owner to remove?

7 months ago a relative asked us to store some personal property in our garage. The intention was that he would have the room for it in less than 2 months. For the past 5 months we have repeated requested he remove the stuff, to no avail. Two months ago he attempted to remove select items and we made a verbal agreement that he could take two valuable items at that time with the agreement that he would remove everything that month and transfer ownership of an item that he and my husband jointly owned which he had stored offsite, as repayment for the 6 months of storage. Now another month later and another promise to get a truck and remove the stuff and no follow through. what rights do I have to dispense of the items? Much of it has minimal value and would go to the dump. the remaining few items we might sell to recoup the costs associated with storing the items, disposing of the junk, and loss of the jointly owned piece of property which we expect we will not receive.