Just to add that the item to the left of the Rodney Milling attachment in your later photo is a milling table for it so that it can be mounted on that independently of the Myford to give a bench mounted milling machine . Obviously I would need its own motor and the pulley assembly in that same photo looks like a countershaft / clutch assembly from a Myford lathe to be used as part of that process. There doesn't appear to be a suitably sized motor but they are easy to pick up (about half horsepower will do). I would have thought you would get approaching £500 for those items as a bundle if the slides on the table are not corroded and move smoothly. The Myford VMC mill is a later version and they change hands for £700 or £800 in decent condition. I think there is a raising block (square item with four holes) which also goes with it – sits between the Rodney and the bolt holes at the back of the milling table)
Agree entirely with the sound advice others have given.
Hope you have success with getting this to a good home at a fair price, I hate seeing people stitched up in these situations.
John