2000 All Other Makes All Other Models

I have a 2000 FORD TAURUS. I bought the car new it has a 3.0 V6 engine, Automatic transmission. The car only has 43000 miles on it and has always been kept in a garage when not in use. I just had it inspected and it passed with no problems I asked the mechanic to check my heater because it was not working properly. He said my Heater Core was clogged. He said this is a problem common to the TAURUS. He also said it is an 8-hour job and it will cost $750. I have two questions my first question is this a problem common to the TAURUS? My second question is does it actually take 8 hours to fix and is this a fair price?
November 6, 2007.

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