I'm considering expanding my lens collection. On the short list are the Sigma 30 and the Sigma 10-20. (I know they are very different lenses, but that isn't what this post is about ). There was recently a thread about a good deal to be had on new Sigma f/1.4 30mm lenses at Amazon.com: https://www.nikoncafe.com/vforums/showthread.php?t=177172&highlight=sigma+amazon The thread reported the lens price to be ~$385 US. Today, they are ~$450 US. In that same time, the price for the 10-20 appears to have risen at Amazon. The only other place I happen to have checked and remember the prices is B&H. B&H has always been a bit more than Amazon, and the prices seem to have stayed constant. The only reason I ask is that I remember reading ruminations (perhaps even here) about Sigma raising their US prices. So, has anyone noticed the prices of Sigma lenses going up? Or is this just usual Amazon price fluctuation?