They pay the shipping charges
Amazon Japan is now accepting used games and paying customers with Amazon Vouchers
CNET is informing that Amazon Japan website is now buying used games from customer and instead of do it with real money, they do with Amazon Vouchers. The best part of all is that they also pay the shipping charges.
According to CNET:
You have more info in the link below (In Japanese).
NEWS SOURCE: http://japan.cnet.com/news/service/35016797/
Our thanks to 'Kaos2K' for this news item!