Purchasing used dental equipment or used dental equipment parts can be a money saving adventure . Usually savings can be up to 50% or more from new dental equipment. You must realize though that used means not cosmetically  perfect ,without a warranty , operating instructions, & assembly instructions . If used equipment items are bought from a dental equipment or medical equipment reseller, usually items have been tested  & brought up to a good working condition . If items are purchased from liquidators,brokers ,or "end users" they should be priced accordingly as those sellers do not have the  knowledge or capabilities to refurbish this type of dental equipment . In summery , you may pay a little more for the equipment or parts sold by a dental equipment or medical dealer but the payoff in the long run will be worth it .