Just arrived in japan today (here for 1 week). Found Mandarake in akihabara and picked these up for fairly cheap. They didnt have any super rare stuff, rarest thing were a set of sealed red g2 constructicons that had "not for sale" on them. US/EU vintage TF stuff was overpriced.
They had a Diaclone Red sunstreaker for about $280 (c7 box), was tempting...
Was pretty cool to walk into one shop and have "Hunger" playing in the background