It's for the hardcore megaman fans as a collectors piece not for the collectors who want a cheaper way to play the game but this applies to many collectibles such as this.
If it was cheaper it would have been van impulse buy for many but even than I highly doubt that many people would be truly happy with the purchase if they weren't hardcore megaman fans since it was just bought since it is a megaman game wich has unfortunately been made to yet again make people purchase it.