I don't know where you live, bit in Californy the money goes to the seller. I would imagine it's the same everywhere, but don't take my word for it. I prefer payment in the form of a Postal money order when I sell something online unless it's someone I know.
“If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that ye were our countrymen.” ― Samuel Adams