[ny] How Can I Recover A $37,000 Pokémon Card Believed Stolen From A Usps Package And Now Held By A Delaware Auction House?

Location: New York

Auction House Location: Delaware

I’m in New York, and I’m trying to figure out the proper legal process to recover a Pokémon card worth approximately $37,000.
In March, I mailed a card through USPS as part of a transaction. The card never reached its intended recipient, and I believe it was stolen from inside the package. I recently discovered the exact card listed in an auction at Alt XYZ. The auction house is headquartered in San Francisco, and the card is currently being held at its facility in Delaware.
I contacted the auction house and explained the situation. They told me they would need documentation establishing that the card was stolen rather than lost before they could assist with returning it.
I have been trying to get law enforcement involved, but I have encountered jurisdictional issues. I have also contacted the USPS Office of Inspector General regarding the suspected theft.
I want to pursue the proper legal process to establish ownership and prevent the card from being sold or transferred while the matter is investigated.
My questions are:
Under New York or Delaware law, could I file a replevin action to recover the card from the auction house?
Could a court issue an order preventing the auction house from selling or transferring the card while ownership is disputed?
Would I generally need to file in Delaware, where the card is physically located, or could a New York court have jurisdiction?
What type of attorney should I look for to handle this matter?
What evidence would typically be needed to establish ownership and support a claim that the card was stolen from a mailed package?
I’m trying to understand my legal options and the appropriate jurisdiction before taking further action. Thank you.