Just left Academy in Hiram. They had plenty of 10mm defense ammo, and it was on the shelves by the gun counter, not at customer service. Still one box for caliber. I don' own a 10mm, so I didn't check brand/cost too carefully, but I did a double take when I saw pistol ammo on the regular shelf.
They alo had plenty of Glock mags, PMags, and multiple brands of .223 at the customer service counter, and the amounts were plentiful.
That looks like a decent price for factory ammo ($500/1K) but dang reloading it is just so much cheaper.
I can reload it for about $180 for 1000 rounds of just about whatever barn burner load I want. If you don't have brass then add about $160. So about $340 for a thousand. No reloading kit, well go buy a Lee starter for about $120. So $460 to do a thousand rounds and you can reuse the brass and reloading kit. You will come out ahead in less than a thousand rounds and after that it's all gravy that allows you to shoot so much more.
Reloading is fairly simple (resize/deprime, prime, powder, bullet, seat and crimp-if required then shoot) but requires some measure of safety. I have seen guys reload at the bench rifle shooting, adjusting loads until they got what they were looking for.
You can purchase a Lee bulge buster die from Lee to take the dreaded "Glock' bulge out (not one with signs of over pressure). The bulge buster works $16 with the factory crimp die $18 (you need both).
The 10mm was a good choice even if you don't reload. It's a flat shooter and has lots of thump. I'm still not sure why it never caught on but a strong following is ever present.