Gordon,
I hesitate to suggest this but a good way of getting a good, older machine is to buy second hand. The health warning with this method is that you might buy a pup which either requires a lot of remedial work to get it into reasonable condition, or it might only be fit for the scrap heap. But if you do get a good, secondhand machine there is usually the benefit of a load of tooling included with it. A good range of tooling to go with a new machine can double the price.
If you have access to someone who knows about machine tools then he/she could be invaluable in assessing any second hand machinery available and advising you accordingly. There is a lot of good stuff around if you know what to look for.
Here's the URL of a UK Sales/Wants list
http://www.homeworkshop.org.uk/index.php
For instance, there's a Flexispeed lathe (9th June) on the third page going for £150. The caveat here might be the seller has built it himself from a kit and he doesn't state if three or four jaw chucks are included - buying them new could cost about £300. The Flexispeed was the fore-runner of the Cowells lathe that I have just bought. If you've got the room, there's a Myford ML7 going for £550 complete with 3 and four jaw chucks and a lot of other tooling. Older Myfords are worth considering if you have the space since the company is still trading and supplying machines and spares.
In your searches, your online bible should be http://www.lathes.co.uk as has been mentioned already. It is an excellent review source of all machines which gives good pointers as to whether it is worth chasing after a machine, new or used.
Jim.