I've used AmmoSeek.com a few times when I was in the market for some 9mm and .223 ammo. It's been pretty handy for comparing prices across different retailers without having to jump from site to site. For the most part, the listings I've seen were accurate, but I did run into a couple of instances where the stock wasn't as advertised, so I always double-check with the seller before ordering. Just keep an eye out for the shipping costs, as some places try to lure you in with low prices but hit you hard at checkout. Overall, I think it's a legit tool, just tread carefully and don't forget to read the reviews of the sellers when you can.