How to hire a good assessor

[Eric Wagner]

I need to hire an assessor to take a look at a piece of property I will be acquiring. In this case, It would be better for me if the value assessed is on the lower end of the scale. I know you're not supposed to be able to influence that, but I really don't want them over-inflating the assessed value. 

Any tips on how to choose a good assessor, and how to interface with them?