To purchase this direct, $14.
Purchase via a service provider, $150 (with installation).
Ok, it is gas, and I do not know what I am doing, so would have trouble installing myself, however this is quite a mark up….
(Interesting site btw for fix it yourself)
via Goodman Furnace Flame Sensor B11726-06 B1172606 [Flame Sensor B11726-06 B1172606] – $13.79 : Appliance Parts from Midwest Appliance Parts, Appliance Part Service, Chicago, Water Filters, Appliance Parts Chicago.