I have been anticipating buying some EZE Lap diamond plates, a la Paul Sellers (Coarse, Fine, & Super Fine), and the best prices seem to be through Amazon.com. I was holding off ordering because the Coarse plate was out of stock. Well the prices of the Fine and Super Fine plates jumped about $7-$8 each overnight. They were running around $43-$44. Now they're $50.36 and$51.65 respectively. I went to Camel Camel Camel and checked the price history and it seems Amazon's prices for the plates are much more volatile than the regular diamond market, and their prices were going up at times when the diamond market prices were declining. Any ideas why?