AMB TranX 260 transponder for sale

I have a wireless AMB TranX 260 transponder for sale. It is in good condition, used last in August 2014 and the battery is in excellent condition (gives 5 green blinks when charged). Once charge lasts whole weekend. I do have the charger, but not the cradle so I use 2 alligator clips to charge it. If you can't live with that, a new cradle/charger/etc can be purchased at Pegasus for $58 (P/N 5002). These sell for $499 new (with charger). I'll take $285.