I would not buy anything from a seller that is also selling water heater thermostats listed ad "New Electronic Thermostat For Hatching Eggs Incubator" http://shop.ebay.com/shamoman/m.html
True, i have incubated before by hand and i kinda liked it! anyways that's a good idea plus i already have 2 little giant Styrofoam incubators so ill probably just stick with those even though i was hopeful to upgrade! ill need to look at the homemade incubator page to try one!