Hi Alex,
I have a Chester Craftsman lathe, bought many moons ago and would have to agree with most of the points you make, but bear in mind that they are very much made to a price. They are not toolroom machines.
My experience, for what it,s worth has been ;
A The allen screws used on them were total crap, I replaced all of then with good ones
B Did have a slight problem with vibration at one of the top speeds, seemed to vanish after I bolted the lathe to the floor and wall. Not really much of an issue.
C Overall finish was not great, switches needed to be set right and gibstrips checked, nothing major.
D As an entry level machine, I considered it to be reasonable value. Anything better would have been wasted on me at that time. Might like a better lathe now, but since this one does all I want, perhaps not.
E The "Manual" ??, yes that was a joke, must have been written by the Head bottle washer in the local Takeaway.
F I suppose a lot depends on what you want the machine for, but you must bear in mind that it was not offered as a top grade model. A case of "Horses for courses " perhaps
Overall I am happy with my lathe, not the best around, suitable for purpose, and yes, it does pay to see before you buy. I have been down that road too with other things.
If you wish to sell it on, I don't think you will have any trouble, they are OK for most work, just not toolroom.