One way to purchase a used well pump is to go through a dealer who specializes in the service, such as Willamette Valley Pump. Another way to purchase a used well pump is to go through a dealer that also sells new water pumps, such as Water Pumps Direct.
At Willamette Valley Pump, the refurbished and reconditioned pumps for sale cost about a third less than purchasing a brand new model. Most of the pumps they sell work well, but were sold to them by customers who needed to upgrade pumps to accommodate a larger well. Water Pumps Direct only occasionally sells used water pumps, and its used selection usually has minor scratches and dents.