Selma Tax Sale Advice

I’m looking for advice from you people, if anyone has experience in this area. I just learned that the city of Selma (in Dallas County) assesses, collects, and forecloses its OWN ad valorem taxes. If no taxes are paid at all, the county has its tax sale, and the city has its own tax sale. Tax liens might be purchased by two different people.  Anyone have any experience with this process? I’ve heard they are the ONLY city in the state of Alabama authorized to do this.