I haven't bought a new lens in about 8 months and I'm now looking to add, what will likely be, my last lens. However, I noticed while searching prices on the Sigma 10-20 that the price of all the lenses I have, have increased a good 150-200 just in the last 6 months or so. Is that across the board w/ other brands or just the Pentax line up? What accounts for the sudden jump? Last I heard, Obama wasn't giving out photography stimulus money Did I miss something?