Hmmm...
Well, I won't discuss the rarity of the various "unofficial" or "not for
sale" releases (or "omake" items like the Bizarre de Gozaru handbag) - they
are just about all pretty rare. I also won't speak about the rarity of
multi-pressing sub-releases like Tokimeki Memorial...
I found all of the USA titles to be available (although some are only
available at a premium price), but Dungeon Explorer 2, Dynastic Hero and
Beyond Shadowgate were a bit more difficult to find than others. You might
have to search for a few weeks, but really a few weeks is nothing.
The kings of regular-release hard-to-find, in my opinion, were:
Sexy Idol Mahjong Yakyuten no Uta
The TV Show
Go! Go! Birdie Chance
Shin Evil Spirit Legend
Quiz no Hoshi
And one of the Nobunaga games - but I can't remember which one.
Actually, that's basically sorted by rarity too (most rare at top).
I feel pretty lucky to have found them at all. And I recall that they were
all expensive when I finally *did* find them, but the price was no longer
important - I searched for a couple of years for some of these. And
"Yakyuten no Uta" was just a fluke that I accidentally found when I visited
Japan - I couldn't believe it (before that day, I had never heard of the game).
- Dave