Shoppers Square
may be accessed at the top of the page you are now reading, a place Robert (webmaster) created so that listings in ebay, Craigslist etc. could be recorded for easy reference, the icon is almost exactly in the centre of the page. Robert has added more functionality so that ebay listings are highlighted at the top of the screen, the default is USA but you can set it to UK by clicking in the appropriate box.
And £350 is way over the odds for a Hoovermatic - they are fundamentally a simple machine (much simpler than the Hotpoint and Servis models, although it has its limitations resulting in the tangling) that was made for many, many years. You should be able to pick up a late model for around £50 (and I have got a reasonably rare early model in good condition for £10 in the past off ebay) - if you are concerned about parts you could even get two for a lot less money - one to use and one for parts if you felt you needed it
Al