Certainly the internet is the easiest place to find them. But in my opinion, the most fun way to find knives is at the knife shows around the country, where you can look through 10,000+ knives in 1 afternoon, and hold every one if you wanted to. You meet a lot of interesting folks, and you see things you never knew existed.
Knife Shows aren't well publicized, which is a shame. But if you can find one within a 2-3 hour drive, it is worth the time. I'm not sure where you live, but Kentucky, Tennessee, Missouri, Ohio, Pennsylvania, Virginia are all full of shows throughout the year.