As I have a relatively small collecting budget, but ambitious collecting tastes, I spend a lot of time scouring the internet for deals. Probably too much time, but it often pays off. A while back, I was looking at cards on the Trading Card Database, when I noticed that there was a link to a trading card site called Kronozio. I had never heard of it before, but decided to look and see if there was any good cards. Though it's a smaller site, I was able to find some very good cards, and I made my first purchase from a store called, oddly enough, Frames, Plaques, and more.
Though the prices vary on Kronozio, all the cards I got were below the price on COMC, so there are some very good deals to be found if you're prepared to look a little.