Chinese Web Sites or on Facebook (who don't vet sellers) easy to spot.
1. No return address on the returns policy............thats because the site will look as if its in your country (where they despatch goods from) BUT they will ask for returns to go back to China (returns depot) at a shipping cost nearly always more than the item is worth. 2. No contact telephone number............if you click on contact the most you will get is webmail or an email address. 3. No company address information. 4. Great items at 'bargain' prices ie tat.
Paypal buyer protection can never be a 100% coverall, so in the event of a dispute you need to bear in mind possible return trackable costs before you buy from that seller / item / country......and China is expensive for larger items.
Paypal state this >> PayPal is not obliged to reimburse you for any costs that you incur to comply with any of PayPal’s requests for cooperation for the purpose of resolving the problem (including, without limitation, costs that you incur to return a SNAD item to the Payment Recipient or another party as PayPal requests), although sometimes it may reimburse these costs.