I live in AZ (yavapai county) and found the changes in the county tax sales interesting. Did you notice they no longer show how many other bids have been received on the property. Now it just says sealed.
We have a couple properties that we are considering contesting the values they are taxing us on. They went all out raising the values when the market went up but we very slow in lowering the values. Part of that is due to the fact they only reassess values every few years.
A word of caution to some of the newbies....Be careful in the rural areas as not even the aerial maps show the true story on some of these places. Went to look at one property yesterday and the road was so bad to get to the properties in the area we turned around. We'll have to take the 4wd to get back there. It was probably one of the worst dirt roads I've ever seen and it's not maintained by the city as it's outside town limits not even sure if it's county maintained as some are not..