Wheres can I find the BEST price for an AMB transponder?

Most places are close to the same price because AMB offers little discount to resellers.

and they charge a butt load for what they are. I guess thats what happens when one company has a monopoly on something.

These are just as good & work with AMB systems...

http://www.team-mrt.com/rclaps/ptx/moreinfo.html

They will actually clone your AMB PT so you can have several with the same #.