I have bought both, new and used. Got a great price on the used no doubt and was a very good bike but I was constantly chasing little issues here and there. Once I ran very low on fuel and after filling up it would hardly run. Come to find out the bike at one time had sat up for a long period of time and the lower large retangular filter was stuck to the bottom of a rusty tank. After restoring all of that, all was fine again concerning the fuel. Just items like that. One thing on a preowned I have noticed, be aware of previous owner mods. Sometimes they lack the skills to do the work properly. I ran into this with wiring issues with the larger apes that were installed. Just depends on how much and how handy you are with motorcycles.
