Available on Project MUSE and JSTOR. Online access to Contemporary Literature is available as part of the Project MUSE collections. All back issues of Contemporary Literature beginning with Vol. 1, 1960 are available online through the JSTOR digital archive.
Many manufacturers recommend water heater anode replacement every two to four years depending on the hardness of the water that passes through the tank and the quality of the water heater lining.
I live in MA and the average water heater replacement install is about $100. It takes about 30 to 45 minutes. Maybe you are including the heater? Cost for a water heater here is 3 to $400. I personally have not had to pay for the replacement heater, as I buy one with a 5 to 7 year warranty, and they usually need replacing, just under my warranty time.