almost anything you buy online should just be for the aesthetics... of course there isn't much you can do with a sword anymore so that should be fine... if you plan on using it in cutting the best idea is to ask the teacher in whatever class your in... if you're planning on cutting without a teacher... well you're already taking your life in your hands so use any ol' rusty piece of metal

If you want something to practice with, there are all kinds of wooden, foam, padded, etc training weapons you can find online... pretty much all the sites have similar prices and products... however if you get a wooden sword you're going to need to get some kind of armor as well and a dedicated sparring partner... and be careful, a piece of hickory can break bones, for training purposes I would say always avoid thrusts, unless you are supervised, because the force of a thrust is very concentrated, even a foam practice sword can cause injury with a thrust