He indeed states that it's not one of the original 72 stickered tiles. He also states that he's selling these with permission of HiG after they checked the quality of his craftsmanship.
I'm sorry to sound nasty, but placing a sticker correctly on a tile is not "quality craftsmanship" IMO...
Can he proof HiG gave him permission to do so, when HiG never released La Porxada to begin with, but the spanish publisher.
I mean, I myself could make La Porxada and sell them for 5 euro to anyone who's interested...