Actually a lightly to zero wear ML7 is a pretty rare beast. I would be inclined to sell it all together as well especially if ebay is involved even with measuring stuff etc.
A lot depends on how much work it has actually done really and only you can judge that but a few small steam engines and few odd bits and bobs would suggest it aught to be like new if it's been looked after. One very telling things on an ML7 is if there are any shims left under the bearing caps. Looks like there is but can't really be sure from the photo. They are terrible things – laminated. The general idea is that when the bearing show wear a layer is peeled off and then the bearings should be scraped to fit the spindle and keep it level with the bed to very fine limits. Great fun as the front and rear have to be worked together. With luck only the top ones have to be done. I did this with the phos bronze bearings Myford switched to. The first batch that had an insane scraping allowance on them, way more than it should be and both top and bottom had to be done. The shims Myford used are a pain because it's rather difficult to peel a single layer off.
Not sure what the X-Y stage shown in the last photo is for. Interesting way of making one. I'd guess it moves the round part around so might be used to centralise something or the other with rather limited travel.
If not worn at all it is easily worth the higher number mentioned subject to the fact that all even new lathes vary a bit. Getting that might prove difficult though. One simple way of testing the headstock bearings is to free the spindle from the belt and rotate by hand. There should be a bit of drag. As I understand it not much just a little. The Myford manuals may give a clue on that but it's the sort of thing that may vary out of the factory.
John
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Edited By John W1 on 06/07/2015 23:33:22