What a fantastically unique gift idea these make. For the geek who has everything, including a mechanical keyboard that uses Cherry MX switches, and likes to customise the hell out of it.
In all seriousness, these are pretty damn cool, even if they do only serve a very niche market, although, the amount of mechanical keyboard users who are Super Mario fans is probably close to the 100% mark, so this is quite a clever idea.
But for once in his life, Luigi is in a higher position than Mario. Lap it up Luigi, lap it up.