Hello,
Typically, you would need to notify the owner of the items of your intent to sell if they are not retrieved and/or the storage fees are paid in a certain period of time. The easiest method would be if your aunt willing to simply sign the items over to you. However, in Pennsylvania, property is considered unclaimed/abandoned after 5 years.
In general, unclaimed property in Pennsylvania is governed by Pennsylvania's Disposition of Abandoned and Unclaimed Property Act, 72 P.S. 1301.1-1301.29. (Reference)
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