I'm retiring after 35 years in the business. This Nikro PDC 4000 air duct cleaning machine was bought in late 2021 and has been used on only 3 jobs. In fact, the factory wheel protectors have not even been removed. I'm including five heavy duty flexible ducts with connectors. I bought it for $4,195.00 but asking $3,300.00 or best offer. It's very powerful with 5000 CFM.