Underlining what other, more experienced machinists have already suggested, my 7x12 lathe came from Hugh at Amadeal (
www.amadeal.co.uk) priced around £270 IIRC two years ago and I'm very happy with it. Though I've yet to make anything more substantial than studs for my BSA Winged Wheel, thumbscrews for the Myford and so on, it's inaccuracies seem on a par with (ie no worse than

) other, more expensive 7x12 Chinese lathes (from Chester, Warco, Machine Mart and so on).
One thing I've noticed: second hand, these lathes fetch almost as much on Ebay as they do new.

One other thing I've noticed: there are two distinct styles of cross slide, one is rectangular and the other H-shaped (the lathes sourced from Sieg and allied works). Each, presumably, has its merits but only the H-shaped cross slide will take the popular vertical slide as sold by Chester (Small Type 1
www.chesteruk.net/store/vertical_slides.htm) if you're planning on using the machine for milling.
An alternative, though, is the Warco vertical slide (
www.warco.co.uk/Vertical-Slide-C53AACDF7A.aspx) which doesn't look as substantial but is a simple replacement for the topslide.
David: your engine is truly lovely

Jerry