The Rivett was one of the finest lathes ever built. Google "Tony Lathes". Go to his site and find the Rivett section.
This particular lathe is one that has the highly finished headstock and tailstock. The ones made during the war had these two castings left as cast and painted black.
The Rivett lathe has more surface for the carriage to rest on than any other lathe anywhere near its size. Like any machine,though,things will eventually wear out. Look at all the surfaces the carriage bears against to see if scraping marks still remain.
Rivett also made this lathe with a QC gearbox. Too bad this one does not have that. But,if it isn't worn smack out,it is easily worth the price.