I brought in a case of mixed probe lengths just to see what the demand was and I'm probably not going to stock them going forward. To simplify my shelf, please buy these at a very reduced price. $35 for either 2.5", 4" or 6" probe length. Stock is limited, especially on the 4 and 6.
http://www.brewhardware.com/thermometers/123-aa-thermo
http://www.brewhardware.com/thermometers/123-aa-thermo