Still good: Yellow Pentax K-01 w/40mm XS for $317
The yellow Pentax K-01 with the 40mm XS pancake lens continues to be offered for $317 at Amazon by Amazon itself. Given that the price continues for the fourth day in a row, the chances of this being a price-error are significantly reduced. Don't forge to also get "Yellow" by Coldplay, a good match for the camera ;-)
For more on the camera, check the list of completed Pentax K-01 reviews.