I know it''s too late, but there is no way in heck I would send 26k to a stranger and trust them to send me anything. I know that's how this and many other web sites work, but for that kind of money I would have gone to get my parts and paid COD.
I really don't think they will take any personal property and make him pay you back. IF proven guilty he will have to pay you back. If he can't pay you back he goes to jail and you are out of your 26k.
I hope I am wrong for your sake.
I hope you get your parts or $ back and he rots in jail.