Nothing wrong with trying to bilk new money out of old stock if you're going to keep the price in the frivolity range, which is exactly what Capcom does with Megaman X Collection.

It includes all six low-rez, side-scrolling, platform hopping, bad-guy shooting, boss bashing games in the Megaman X series from the SNES to PS1 days and throws in a non-sequitur kart racing game for good measure, Mega Man Battle & Chase, which is likewise a moldy oldie, but not seen in North America before, so most likely new to you. Good, frivolous fun at a fairly frivolous price.