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Waifu Pillow is the best

gold/siulver/platinium ...

WD50EFRX

A new keyboard would be sweet. I've been using this one for a bit more than a decade. I'd love a SSD for my PC. Or a Kindle Paperwhite (I love my Kindle, but it's one of the really old Kindle Keyboards and I really dig the new screens).

New mechanical keyboard and/or a high dps mouse.

A Voltage Controlled Oscillator, a Tuning Circuit, a RF Amplification Unit, and several replacement cell phone antennas.
As for why? Well lets say I am sick of people talking on cell phones in movie theaters

I would try to buy the store. Why not?

I would buy some hardcore drugs since everyone knows the guys that work in the back of most electronic stores have the best stuff!

Serious Answer
I would buy a solid state drive the best I could get for 200 bucks since I cheaped out on mine and my computer is rated by lowerest part in Microsoft rating system as 5.6 but would be at 7.2 if I had a better drive.

A 500GB Samsung Evo 850 or Crucial MX200 SSD.
I can't afford one :(

A new SSD, cause 3 is not enough :P

Nothing because that gets you nothing worthwhile.

A new phone and speaker. I can bring it to a bush and set it to full volume. I'll download a gun app and use it. All the other people who are bringing their $200 are going to be scared sh-(insert asterisks here)-less and drop their munny. I'll later on take their munny and set up massive traps for the next set of $200-bringers. This time, I'll use some munny to buy some explosive-making equipment and set it up a bomb-ish type of item in the pile of cash. I'll go back to the electronics store to buy a few 40,000 watt electrical fences that can come out of the ground and slowly close in and fry everything within it. The fences will surround the pile of cash through a large radius. The victims will come and two things will either happen: they'll get fried to death or get blown up. I'll be the richest villain in the world. Muahahahahahaha

Then, I'll use all my munnie for ice cream... Mmm, Ice cream ...and maybe some puppies and a few kitty cats.
Perfect use of $200!

I would sell my current, old 560 GFX, add 200$, and buy something old but more decent

An ultrawide monitor.

new GpU or smart sphone well time to upgrade

Hauppauge HD PVR 2 (a lot of positive reviews for the ElGato, but heard there is a larger delay when streaming). Kind of want to upgrade my recording hardware from 720 to 1080, and it would give me a head start for whenever I get a PS4

The souls of my enemies.

A good headset.

New graphics card, 7 year old card ftl.

A Flux Capacitor, because why not?