I “took a punt“ on eBay, a Dewalt DWS778, sliding mitre saw, 254mm, 1850 watts, 240 volt, 305mm width of cut, compact design with the internal rails.
Price was £10.90 buy it now, including vat and delivery. Yes that is ten pounds ninety pence.
Current price is about £450 upwards, currently the 110 volt version is £620 in Toolstation
DeWalt DWS778 250mm Compact Compound Slide Mitre Saw 110V
Genuine UK based seller. Recieved notification of dispatch, tracking number arrived, and next day it was delivered. Genuine Dewalt, new, in original unopened packaging, no faults or blemishes. In other words it was not a second, all as advertised, worked perfectly.
Looking at the sellers other sales I assume that it was meant to be an auction, but they made a mistake and put buy it now. I fully expected them to cancel the order, and I would not have left them negative feedback. They honoured the sale, much to my surprise, and delight.