I buy used all the time, as mentioned above, but I always try to buy it locally and avoid shipping, because you never know what's gonna be in the box.
My hardware purchases, thrones, pedals too are always new. There is nothing wrong with buying used however good luck finding certain kits that are no longer available. If you fell in love with a Waterfall Bubinga DW kit and they stopped making that finish new then you lose ( dont know if thats true, just thought of that). My 2002s are all used and mint condition. The guy switched from acoustic to electronic after moving to an apartment. he was a non-gigging drummer so the stuff wasnt even played that much. I saved hundreds. My 15in sound edge hats were 150. why turn that don and go buy them new?? We all like new, but the market for used is much larger, and there is no 6 month wait for a shell pack!
I'll be nakedly candid here with the hope of not sounding like a snob: I always buy brand-new gear. Though a preowned drum or cymbal may appear intact in photos, I have no idea how it's been treated behind the scenes. Poor technique, careless transport, and haphazard storage can wreak havoc on shells and bronze. When I buy new, such worries are abolished, and if something is defective or declines prematurely, it's backed by warranty and can be replaced with relative ease. For me, the assurance that goes along with factory-fresh equipment is worth the added cost.
I look down on no one who prefers used gear, however. There are great deals to be found for sure. Our constitutions dictate our habits, and I'm risk averse when it comes to purchases. There's nothing more behind my views on the subject.