I want to figure out how much my pachinko machines are worth, since I might be thinking of selling a few of them. Can anyone help me put a price on them?

CR Back To The Future (Sammy 2008)
CR Ghost in the Shell Stand Alone Complex (OK 2012)
CR Combattler V (Kyoraku 2012）
CR Fever Ranma 1/2 (Sankyo 2011, playfield only - compatible with Macross/Evangelion frame)
CR YuushaOh GaoGaiGar (Santhree 2011, playfield only)
CR Hissatsu Shigotonin IV （Kyoraku 2011, playfield only)

I want to acquire a newer pachinko machine, and have limited space, so I'm thinking of selling one or more. I'm more inclined to sell the playfields than a full machine, but once I have a grasp of what I can get for them, I can decide which ones to sell.