Hard to say with the price drop, since there's a mixture of supply / demand and recession. Truthfully the price on amiami has been like that for months, while play-asia put back the MSRP. I remember around late last year when the game released, it was one of the top selling games, but like any merchandise, sales drop in an negative exponent slope.
Dun think many people buy games from amiami since they're more of figures and merchandise in general.
For the conventions, they're prices are just all over the place. Dun ever trust their prices since either they're way over priced or sometimes under priced. Recently however, they have been slowly keeping with market pricing (got Idolm@ster Christmas 4 You for like $20 at Otakon one year).
As far as in the game itself, the game isn't really crap IMO, but that's form personal experience. Some people may like it some people don't, it's a good right before bed game which I've been doing for a few months since that's the only time I can play the game. Got Eri to Rank C so far.
