I just bought 2 boxes of CCI .17 HMR yesterday from a Wisconsin/Minnesota chain called Gander Mountain. I paid $8.99 for each. Did not check the price for the other brands as I mostly shoot CCI in this caliber. However, I did see that they are well stocked on the Hornady, Remington, and the local favorite, Federal.
The Minnesotians are really loyal to the Anoka, MN Federal cartridge products as they are locally made. I found their .22 rimfire to be decent, the pistol cartridges are poor, and my local shotgun club, as well as myself, tends to avoid their shotgun loads when trap shooting too, we use Winchester XX mostly. I was snubbed by Federal Co. years ago when I applied for a job, and then did not think much of their ammo, so I am not a customer.
I see .17 HMR is widely available at the gun shows, which is another option and their prices seem competitive.