Target is running a promotion where you will be able to buy PS Vita at $200. This is not an official price drop, just a promotion at their store which lasts from August 18th to August 24. So if you are on the fence regarding the system, now would be a great time to buy it.
Sony has not hinted at an official price drop yet but it is due considering the sales of the system. More information could be revealed at Gamescom and we will keep you updated on that.