Put 'em out at auction and see what they bring. If you're serious about getting out of it, why would you spend a couple of years selling them? A well advertised high end collection should bring good money in any metro area. For Pete's sake, you're in North Atlanta suburbs. Don't tell me there's not an active market there.
It sounds to me like you are looking for top dollar on machines that you put more money and time into than they warrant. I have no doubt your machines are mint, but that doesn't make them make bank. If you were serious about selling, they'd all have prices and NAVL would be coming to your house every day for the next 2 weeks. As it is, good luck Muskie Hunting.