Taxes are computed deferently in different Couties and States:
Some rely solely on the lastest ASSESSMENT.
Others reevaluate the taxes every time the house is sold; they figured, long ago, that with housing prices going up, they could make more money by doing this since each succeeding sale would be higher. Little did they know...
You need to find out what method they use:
If you are going to buy the house for less than the last Sale, your taxes will go down.
The most popular rates are in the 1.25% to 1.50% area, but I have heard of 3%.
One source for good information is your TITLE COMPANY; you can go in and ask their help, and then specify them when you make your offer.
Good luck and may God bless