As I promised, I report the results. There was a moment that caused concern, but in the end everything worked out.
So, after paying for the order, they sent me the PayPal wallet details and instructions for using it. Nothing unusual. I created a cryptocurrency wallet called Exodus. Then it's time to withdraw money there. It turned out that there are very few exchangers that exchange dollars from PayPal to Monero.
All exchangers are located in Georgia, Estonia and Ukraine. I have mistrust in all these countries and I have heard a lot about high crime and corruption. I had my doubts, but I couldn’t find anything else, so I decided to try it. After paying to the specified account, the support service stopped responding to me, and my cryptocurrency wallet was still empty.
At this point I started to get nervous. Today the payment arrived almost a day later. This made me happy. Now I know exactly how to proceed.
Good luck to everyone, friends!