Weak links are the motors and speedos as you may have experienced.... 
Indeed - email just sent your way!
OK - interesting replies. I will tell you a little more about why I ask then maybe your thoughts and suggestions will change.
I've been into hobby engineering for 4 years but was a slow learner and didn't really understand machining setup and accuracy at the start. I purchased a Clarke mini lathe which was great to get me going. I the got the boxford model a because it was a give away at £100. However, over the last year I've struggled.... The bed is worn, the power cross slide does not engage, the gear change isn't quite functioning correctly, I've 4 chucks of which all need their jaws grinding true. I just struggle to get it running correctly.
Last week I picked up my perfect condition X3 mill with glass scales and DRO. It has been like a dream. Jobs that took me hours on the small X2 that I never had running perfectly, are now a doddle to setup and do!!
With a family of 4, carvan, work etc... I want my time in engineering to be spent building things as that is what I get my enjoyment out of. The boxford is definitely worth something to someone as with more experience and time than I've got, you could get a lovely running machine. I just fancy selling it and making up the different with birthday money and getting a ready to run machine.
I don't now if everyone understands what I am saying but I just feel based n my experience with the lovely mill, a lathe running nicely now would be a great investment.
Problem is..I'd be sad to move down from the size of Boxford too much!
Chris