Just out of curiousity - how did you work this before? Were the agents allowed to lower their prices to match what was available in the US?
On average, how much would you save?
Also - what happens if you do try to book with a US agent? I assume you have a major credit card?
What do you think your options are?
I am the editor, but I also speculate, ask questions and play devil's advocate. I reserve the right to change my mind.