Space Invaders meets mahjong

A link to an eBay auction appeared on Gamesniped about a Space Invaders Mahjong set. The tiles have pictures of the ship, aliens and the shield in different colors. While unusual items typically fetch a substantial sum on eBay, this memorable piece of Taito swag sold for a mere $7.00. Space Invaders might not have as much demand as Mario swag, but how often do you see video game mahjong tiles?