Generally, people go to Yahoo Japan to buy second-hand items. Nichia and Rakuten usually buy value-for-money games.
The bank card issue is unclear.
The shipping cost of js is cheaper than tenso, but the speed is a little slower. I use tenso because the game is lighter. The postage of tenso is not much more expensive than that of js, but it usually costs 5 from the time I place the order to my hand. About days.
In addition, Yahoo Japan Auction has domestic dealers working there, and second-hand games in good condition will suddenly have their prices raised before the auction ends, which is very bad.