Non-digital or mechanical thermostats are available for purchase at Lowes and Home Depot as of 2015. Both retailers carry an assortment of Honeywell and Cadet brand thermostats, including the classic round-style by Honeywell. Prices range from $15 to $20 depending on brand and model options.
Honeywell's non-programmable, mechanical product line includes standard thermostats for warm air furnace and radiant hot water systems, as well as line voltage thermostats for use with electric baseboard heaters. Some Honeywell models also allow for fan operation switch adjustments, for use with steam or gravity heating systems. Honeywell's CT87N model provides these added features, along with the ability to control cooling systems.