Rather than trying to aim for a selling price, come at this from the other direction to work out if the numbers add up.
You say you have restored a number of lathes, so you should have a rough idea of the number of hours work involved to strip, clean, re-machine, refit, repaint & rewire a small lathe – multiply that by the hourly rate you would be happy to work for to get a labour cost. Certain parts could be viewed as “replaced as the default position” such as standard size bearings, belts and the electrical control equipment – relatively easy to cost. Paint & painting materials always suprise me WRT cost these days. Then you are into the unknowns – are any MTB specific parts likely to be required ? If so are they available & at what cost – Myford parts are no longer as cheap as they were when Myford were in Beeston & availability seems a lot worse. Is the chuck salvageable or would a replacement be required ? Is the motor still servicable or is a replacement required ? Will you offer any form of warranty ? Any overhead costs to cover ? Add it all up to get an idea of where you stand.
Then go on Ebay and look up “items that sold” for the machines you have in mind. Lowest prices most likely the “well used” types you might reasonably look to buy to do up. Highest prices for the nice examples to give you an idea of what the market values a machine like your refurbished one at. If the difference between low & high prices is less than your projected costs to make the job worthwhile, don’t bother !
If you have suitable machinery (large enough surface grinder to do Myfords particularly) then I would second the idea of offering a bed & saddle regrinding service. More likely require a small planer to do “soft top” inverted vee beds like Boxfords, with a grinding attachment to hardened inverted vee beds. Most commercial grinding shops seem to either not want to do small machines or the pricing at industrial levels is out of reach of hobbyists pockets, so the ability to offer a cost effective limited service to the hobbyist would appear to give you an open market. Most hobbyists could do the stripping, cleaning, repainting etc. and effectively rate their time at no cost, but would struggle to do the “difficult” bit of re-machining the bed & saddle. So make money on the bit that prospective customers struggle to do without investing your time in doing what they can undercut you on. Both Boxford and Myford used to offer such a service, but both are long gone now.
I worked for a company that rebuilt & retrofitted CNC machines for over 25 years & it was increasingly difficult to be competitive. Eventually we only worked on big stuff – vertical borers particularly, with the odd floor borer, heavy duty lathe or special purpose machine – where the cost of new machines was still a lot higher than a rebuild + we could rebuild one in a shorter time than the lead time on a new build. As the cost of smaller machines fell it was usually cheaper to buy a new machine than rebuild or retrofit and older one.
There is a reason there doesn’t appear to be much activity in this sector ! When reasonable quality, fully equipped hobby sized lathes can be bought from suppliers of Chinese equipment for £2k or so upwards, that is were the main competition will come from.
NIgel B.