Be careful buying a used receiver on amazon and especially ebay. If the unit has an outstanding balance due, DISH will not activate it. You would be better off buying from a dish retailer like dishdepot.com
You can purchase a DISH receiver from a 3rd party and we would be able to activate it as long as its not already active on another account. This will not eliminate the $7.00 monthly fee. The monthly fee is what makes the receiver active and able to pick up the DISH signal. Dish gives the first receiver monthly fee for free to everyone. Once the leased equipment is disabled on your account, Dish will then send you out boxes to return the leased equipment.