I got a Wagjag deal that cost me $50 for 10 vents, which is explicitly clear (unlike a previous poster who posted that he didn't find out till they arrived) and they ended up doing 27 vents, so all in all I expected the price I paid in the end. Just to get that out of the way, these guys are top notch. Spent time explaining the inner workings of the furnace, exactly what needs to be cleaned and why, and absolutely no pressure to perform the additional services which I declined. These guys were professional, quick, and delivered as promised. In fact when I made the appointment, they were clear about what they were offering and unlike most duct cleaning companies, there were truly no hidden costs. If you need your ducts cleaned, these guys are a fantastic choice!