At $100 max you'll be hard pressed to find a Titan, even used they are just a few bucks under retail. That being said, a lot of people, myself included, like the Kamry K100. People call it a "starter" but it's a workhorse.
Edit addition- and after that K100 you'll be well under $100, enough to get an IGO-L rebuildable dripper, some wick, and wire.