Buyee as far as I know is a forwarding service. The seller will ship your package to a Buyee warehouse and they will then forward it to you.
That Beep shop link is the list of prices Beep would pay you if you sold them your copy of the hard- or software, btw. So it's not their actual store prices.
Interesting pricelist from BEEP shop for what they offer for games and systems. I didn't know Guardic was such an expensive game, like 50000 yen expensive...
