Oh that shop is full of magical goodies if you have a look around, they always have new stuff in every week and tons of rare stuff from the 80's especially vinyl. Recently they had every copy of Kissmark and Dears too *lol*

It can be a pain to get payment to them but when you can't get the stuff anywhere else it's so much easier than going through agents and the stress of an auction on YahooJP. Their service is good, they have a loyalty points scheme, and in nearly all packages they send a bunch of flyers or magazines for free.