Whenever you see a cheap rpg lying on the shelves, take it out and check it. And try to realize what it actually says. 100 different enemies isn't that much at all, though it's brought as something exceptional on quite some packages. I recommend buying games in their original box, not in the box of some series, like BestBuy or similar kinds of budget collections. Sierra originals and EA classics are usually okay, but they're exceptions to the rule, as most of these series contain less compatible versions of the original games.
Most companies always release useful patches, even for their biggest flops.
Experience has proven me that new flops are more fun to play than old games. Games that are a little different than the average fantasy game usually flop. Unconventional interface and game mechanics are usually the cause of this. Keep this in mind when you see such games lying on the shelves. The differences in prices can be astonishingly large sometimes.