It all depends on what kind of beekeeper you are.
Are you going to manage your hives, or do you expect them to manage themselves?
If you are just going to put bees in some equipment, and plan on letting them do their thing until you can steal honey, then used equipment is a recipe for disaster. If the equipment has a disease, and you don't catch it in the early stages, it will become a royal pain in the more advanced stages.
If you will monitor your equipment, and fix any issue before it becomes a problem, I would say to get the used equipment.