I'm looking at purchasing two 2004 Amaya Melco Machines and a 2007 Amaya Melco XT machine. They are older and each have lots a stitches on them. I'm having trouble determining what their current value should be. They all include the wide cap frames and drivers, along with them software. I see some out there for $4,500 for the XT but not sure what they're really worth. Can you help me with ideas?