Also, be ware of scams. A popular scam against artists is to send a personalized email complimenting one or two specific art pieces and mentioning their titles. They offer to pay, usually not by PayPal, but some of the scammers DO use PayPal to seem more legitimate. They say they have their own moving company to transport their art, so no need to worry about shipping. They may or may not send you more than the amount you expected and want you to refund the difference. Now, if you have happily shipped off your original, you discover the check bounces or the credit card payment is reversed through PayPal and you are out both the money and your artwork.
PayPal's seller protection has strict requirements to protect both buyers and sellers from fraud. One of those requirements is that the seller's (your) paypal address is in the U.S. Another is that you ship to a verified address and using a shipper that can provide proof of delivery or proof of shipment. That means FedEx, UPS, USPS, etc., NOT a random moving company that the buyer arranged. That is almost guaranteed to be fraudulent. You can read about PayPal's seller protection here:
https://www.paypal.com/us/webapps/mpp/security/seller-protection
Hope this is helpful!