I am not 100% sure, but I bet that JOB Billiard Club has cues for sale.
Madison Square Shopping Center,
900 Madison Square, Madison, TN 37115
I see they are located about 8.5 miles north of downtown Nashville. I have not been there in around 10 years, and they have changed ownership since the last time I was there. Was a very nice pool hall though, and I think I remember seeing dealers cases (filled with new cues).
Some of the pool halls in Nashville might have cues for sale too. Just search "pool hall" on google maps, and you will see many in the Nashville area. Good luck finding a cue.