Hot sales of Iphone 5 (presell pieces were all sold out in 1 hour, while Iphone 4 took 26 hours, Iphone 4S took 22 hours) is a factor resulting in chip prices going up this week.
The word is that Apple have rushed production of up to 5 million handsets, soaking up all available chip manufacturing. - Higher than normal demand, means manufacturers can charge more - hence USB prices will be on the rise for the foreseeable future.
Be aware of rebirthed and 2nd grade chip sets during this time, as manufacturers try to combat the price rise.
We only sell A-Grade chip sets in all USB Flash Drives.
For supporting info - see this article.