Looks exactly like the one I got for 40, so I would say someone is just making more money than others.
Have you seen the thread on the calibration box for the senders?
It allows you to literally set the guage at any level of fuel, so you can set it at empty, add a gallon and set it for that and so on all the way to full.
I know what you are going through, as I replaced my guage and sender both with supposedly matching ohm parts and it was still off when over half a tank of gas.
At least it's pretty acurate when below half a tank and at empty.
