Alert to all readers here: I tried this option, and Xoom / Paypal charged it as a cash advance / wire transfer, instead of a purchase. So the credit card that is linked to my Paypal account was charged a cash advance fee of $3.50 dollars, PLUS they charge interest on the amount of the payment from the time the "purchase" is made.
I would highly recommend, based on my experience, NOT to use Xoom / Paypal, although I am informed that using a debit card linked to the Paypal account, instead of a credit card, may avoid this issue. I assume also having a balance on one's Paypal account, could also do that. FYI so you don't get the same hit that I did......and if anyone has further info on this, please post it back here. Thank you.