Estimated price range for a Knock Sensor replacement?

Here is the price for the dealer part and labor time to change it out. There are two of them

Knock Sensor 8961506010 $279.31 OEM list
Labor for both is at shop rate x 2.0 hours.

Here is the location for the sensor and how the job is done so you can see what you are paying for in the images below. Check out the images (below). Please let us know if you need anything else to get the problem fixed.