I like to get the keyboard because i would never have that much money to buy it. I work for 200$ a month and my wife, my kid and I live with that 200$. I saved for a two year just to buy INTEL i3-3220 and GIGABYTE GA-Z77M-D3H motherboard for it and using integrated video card, just to I can play Cabal 2 on the ~20FPS.
Or simply, because I'm poor.