If the contract was taken out in PA (likely if the vehicle had a PA title regardless of whether the title loan company claims their office is), PA law applies. They should have given you immediate notice (if you were there) or certified mail notice. The notice will include when the sale is. The sale is open to the public (though you may need to show you're are a bona fide bidder which may require some security).
I believe charging you for access to your personal effects is ILLEGAL under PA law.
It would probably be in your interest to surrender the keys.
THis may help you: https://www.portal.state.pa.us/porta..._act_mvsfa_pdf

