Right. The first worry is "will this be here tomorrow?" The second is "how much more will they end up charging?" I had good success with maxmind's free databas

Right. The first worry is "will this be here tomorrow?" The second is "how much more will they end up charging?" I had good success with maxmind's free database. I can't find tooth results for accuracy but my sampling was pretty good. They also have an incentive to keep it.