Leading up to the Olympics in China the production of Glyphosate dropped markedly, creating a dramatic American increase in pricing. As I understand it, the leading (only?) producer of Glyphosate is China and they wanted their air, water, earth to appear "healthier" for the Olympics. Urban Myth perhaps, but that's my story and I am sticking to it. Now that their production is back to "normal" the price is down considerably.
Current Glyphosate "pricing" ranges from XsAg:
Product Trading Range UOM
Glyphosate Plus Surfactant $8.95 - $11.75 GL
Glyphosate Plus Surfactant (Truck Load) Call for pricing GL
Roundup Powermax $14.75 - $15.75 GL
Roundup Powermax (Truck Load) Call for pricing GL