In my local walmart they were on the border of garden (not actually out in the garden section...but close) They are with all the home thermometers....they are actually called indoor/outdoor thermometers...as the probe is "meant" to be ran outside so you can see the inside and outside temp.....but they work quite nicely in a herp enclosure. If you have trouble finding them just ask an employee where to find an indoor/outdoor thermometer for your house - cause if you ask for a thermometer for a snake cage they may look at you like you're crazy!

-BT