low voltage thermostat

1.
Honeywell T8775A1009 Digital Thermostat, Heat Only, NonprogramHoneywellDigital Thermostat, Heat Only, NonprogramT8775A1009686208(0 reviews)$42.94 + $8.90 Shipping
2.
Robertshaw 300-204 Digital Thermostat, 1H, NonprogrammableRobertshawDigital Thermostat, 1H, Nonprogrammable300-204434558(0 reviews)$87.45 + $8.90 Shipping
3.
Robertshaw 9405 Digital Thermostat, 1H, NonprogrammableRobertshawDigital Thermostat, 1H, Nonprogrammable9405153394(0 reviews)$60.44 + $7.15 Shipping