I agree with Mike
If I was buying a Myford (and I have owned 2) I would want it as seen and suspect that recently serviced would just be an excuse to up the price, serviced can mean anything. More important to know how long your father had it and the sort of work he did. When it was last used is helpful. Myfords are eminently 'servicable' by reasonably competant users except for bed regrinding and I don't supposes you are going to that extreme. It will be interesting to know the age which can be determined from the serial number which will be stamped on the vertical shear at the tailstock end of the bed at the back on older lathes and the front on newer.
**LINK**
I would however clean it up by removing any swarf etc and wiping down the paintwork, finding and listing all the attachments and accessories and taking a number of pictures. People usually want to know what the condition of the bed is like below the chuck. Lots of dings, cuts and scratches are not a good sign. There is always some marking but in general it should be much the same as the rest of the bed.
To put it bluntly if it's in good nick servicing wont make much odds and if it's in poor nick it's going to need more than servicing to restore to good condition.
I hope this helps, and I hope your late father enjoyed his lathe.
regards Martin