Paypal has two options, "Friends and Family" or "Goods and Services". If you link a debit/credit card, Friends & Family incurs a fee by the sender but no fees if you are using a PayPal balance. With Goods & Services, the fees are paid by the receiver. So, you could have used Goods and Services option, had buyer protection, and paid no fees. Not telling you this to feel bad but to help you with future purchases.
I still recommend reaching out to the mods/leaders on FISD, they may be able to help or at least add the user to a published "beware of these vendors" list.
Any good seller uses tracking numbers especially for higher priced items.
Good luck!