I've used AmmoSeek.com a few times when I was on the hunt for 9mm and .223 ammo. It's pretty handy since it aggregates prices from multiple retailers, which saved me a lot of time. Most of the listings were accurate, but I did notice a couple of instances where the prices were outdated—so it's a good idea to double-check on the retailer's site before you commit to a purchase. I also found a few sketchy sellers listed, so I'd recommend sticking to the more reputable names. Just use your best judgment, and you should be good to go. Overall, it's a solid tool if you want to do a little comparison shopping.