Where to buy Japanese 151?

I'm in tokyo for vacation w/ my family and I'm trying to get a couple japanese bbs, I was able to grab shiny treasures, paradisa dragona, surging sparks, and I want to get 151. Problem is, it's virtually nowhere. I found it in one shop in akihabara for I think 14,000 yen which was crazy, I'm thinking about going back to grab it but at that price I might as well just order it when I get back home. anybody know where else I can check? It seems most card shops I find sell solo full arts