Just because you pay $150k for one home, 2 doors down may sell for $125 k and their taxes could be higher. vise versa...
When considering a home look at their current taxes. It will not be based upon what you pay for the house now. The current taxes will be the tax you pay for that home for the rest of the year.
Go to: http://homebuyerhomesearch.com/ click the Tax Record link (more or less in the middle of the page).
and enter the address. It will give you the current tax info.