One of the things I have found in all my searching around is that some of the older lathes are:
1. Well taken care of and have all their parts and gears etc (typically more money)
2. Stored in one location for a long time and the parts stayed with them (people cleaning out space and price is reasonable or cheap as they don't know much about it)
3. The worst one it that they were stored and some one threw out the boxes with the gearing, tools etc or sold them (Could be cheap but will cost you to track down parts or the people want same value as if the parts were still there)
4. Lathe has been abused or used to its max and things are lost or broken (may or may not be a deal depending)
The lathe you are looking at will need gears to cut threads of different pitches, not sure how feeds work on a Myford?
There is a few Kijiji adds offering some parts on the Ontario site - collet fixtures, face plates etc, The middle add I sent you even has a full base for the lathe and the third one appears to come ready with lots of extra's.
May be your seller has the stuff and just didn't post it?