I got a relatively fancy mouse for its additional buttons and DPI settings, but they're not really used for gaming. Buttons are typically media controls, DPI settings are for graphics and modeling work. It was roughly the price of a normal one.
Keyboard, however, I see no reason to get a fancy stupid one. Like, it glows? Congrats, your keyboard is obnoxious.
You have obviously never typed on a mechanical keyboard.
Have a bad brown townogy:
Imagine there were no speed limits, now imagine that nobody gets to see eachothers cars because whatever you don't really see other people's keyboards.
People oblivious to the existance of supercars will be perfectly content with driving a regular one, that is until they have tried a supercar out.