I’m going to say what most people don’t like to hear, but is usually right. Unless you don’t have a tripod at all and need one right now (and can’t afford to invest in a premium quality, long-lasting tripod with your current photography budget), don’t spend money on a tripod that’s half as good and still pretty expensive. If you can wait and save up until your budget allows you to buy something that will last you indefinitely, you won’t regret it.
That leaves a few questions. What is the price range you’re considering right now? Do you already have a tripod that you use? Also ask yourself how often you’ll be using it and will your photography pay for it one day?
Personally I bought a Manfrotto 190CXPRO4 Carbon Fiber Tripod and a 496RC2 ball head. Unless it breaks (which should be under warranty anyway) I won’t have to buy another tripod in a long time, if ever. As far as buying used, use caution as always. That might be a good option if you can find one in nice condition though.