Long Story Short, My Stuff Was Stolen By A Family Member.

[SleeperAgent]

I think since they stole players you should call the police. It's a lot easier to prove they are yours than just movies. If you have receipts, or bought them online where you can get proof of the purchase (amazon, bestbuy...) you can show the cops that you rightfully own this stuff. Worst case scenario the police go over there and look around. That would make it nearly impossible to sell the stuff.

Talk to the rest of your family about this situation. Don't want anyone else getting shafted by this "person".

Also, if the police do want to arrest this "person" do not obstruct that with sentiment. Let them learn.

Sidenote: If they are willing to stoop that low and get past the police investigation (if there is one), you could always be patient and "liberate" your stuff when the chance arises. It's not stealing if it's your stuff.

EDIT: Looking through your collection, it shouldn't be too difficult to prove that the Pulp Fiction steelbook is yours seeing as it can't be purchased in America. If you have a receipt or online form proving that is yours you have them nailed when they tell the cops they "bought" all that stuff.