Techchef,
I saw the same deal and thought great - and then I noticed the reason why it's cheaper.
Radtech now has a BT500 mouse that has built-in rechargeable (via USB cale) batteries - for the $59 price. Then they've also added a BT300 mouse at the same price and I can't for the life of me figure out what the difference between the new BT500 and the new BT300 is.
Does anyone know about this?