You probably saw a couple of months ago where Walmart announced they wouldn't be selling pistol ammunition. I had been watching and while there had been some markdowns there wasn't any price that couldn't be beat with bulk buying and in particular with Black Friday Specials and rebates happening.
That changed as it has now dropped to 50% off today, or at least it did at the Ft. Henry Drive Kingsport location. I was actually alerted to it by the clerk as I came up to check on prices. It was it won't last long if all the sporting goods clerks are that proactive in letting folks know, but you may be able to snag a deal or too. I couldn't pass up 9mm Rem UMC 250 rd mega packs for $25. It was also a good excuse to buy some premium self defense ammo at a great price.
The earlier discounts had thinned some of the variety down, but it seemed that every common caliber still had something on the shelf. I don't know if this is system wide or just a single store, but its worth checking if you need more ammo.