That would be the fair price, but you may get more if you can find someone looking to complete their Marantz system and you can use the Marantz Tax to your favor. As always, there is a "priced to move" price and an "I can patiently wait" price. I'd probably list them at a buck and a half and see if anyone bites.I will say $100 on EBay. Lower in local.
Depends on the someone and their exact ambitions, and motivations.I wouldnt say that. If someone looking for completing a Marantz system, they will go for Imperial 9 or 8, or 7 as minimal. 6 or 6g is would not be in a collector's list.