Fixing machines to sell seems like a tough gig. I've picked up several "boat anchors" for cheap. I think I have done real well at bringing them back to life - however with the time and effort I've put into them (time that I really enjoy), I'd be lucky to make $5/hour. I'm working on a "baby" Huron mill right now. In good knick it is a very nice machine (back in the day it was a very expensive machine). That was then, this is now. At the moment it is just scrap metal. I'll probably spend a couple hundred hours disassembling, cleaning, fixing, making tools, making parts - if I'm really lucky there will be nothing truly wrong with it (the main issue seems to be that it sat outside some - got rained on). Then I'll have yet another mill that doesn't do anything that my other mills can't do, takes up quite a bit of space, does not have any of its' own tooling (though common to my Cinci), will be hard to sell on (#8000, 575V, 3 phase) - but is really cool.
On the pricing for your indicator plates - it that with you doing the graphics? I though there were places around that would generate the plate fairly cheap, so long as the file was ready to go? Some of the guys on Hobby Machinist seem to have it figured out.