Go ahead do it...you will get burned.
I am not the PP Police but here is one reason:
When you send someone a "gift" as payment for goods they (the seller)
have every right to keep the money and not send you anything. If you
complain to PP that someone did not deliver and you sent gift money (if
you are that dumb to file a complaint) they will and are saying tough you
know the rules...you the buyer and seller will be banned and you the buyer
will still be out of your money.
Ask yourself, is it realy worth it to save a couple of bucks in fees?