Love my V1 and the remote display. Never cared for the windshield or mirror mounts but I roll just fine with it mounted on the passenger sun visor. The remote display is down next to the radio so it's not visible to other vehicles or drivers.
IMO just bite the bullet and throw it on a credit card. Buying used plus the cost of dealing with any minor problem will equal or exceed the cost of a brand new, registered unit with all the correct accessories.