I can tell you that last year I sold two AGD Micro CA IIs for $75 each. Both of them were in good shape. I had to sit on them for awhile, but they did sell.
As for the 68 Magnum, I have sold a few of those over the years as well. They are not the more lusted after models. I sold mine for $55-$65 each. All were in working condition. Again I had to sit on them for awhile, but they sold.