Might have finally found my 3.6V8.

HSE, fabulous interior, great engine. One lady owner, full LR service record, newish continentals all round, dealer will service and sort vague steering and suspension knocking as part of full RAC checklist. Full MoT. 3 month warranty

BUT 75K miles. (2007)

What's a fair price to pay?

18500 I would say mate. Check the warranty is worth having- if not try and get money off and get your own warranty. What's it on for?

And I don't think I'd be too concerned over the mileage- 7 year old car so less than average really.

I would say about £17k to £18k. 2014 L405 SDV8 RR Autobiography

2012 RRS SDV6 HSE -Orkney Grey with A/B bodykit - Now Gone
2007 RRS TDV6 HSE - Zermatt Silver - Gone

i would check that the dealer does a proper job of the suspension, or i'd be wanting a much longer warranty.
have you read the new buyers bible? it's around here somewhere. Recently bought a 2007 RRS HSE TDV6 for a Pimp-My-Ride-Project.
DONE: Meduza front bumper, AB rear bumper, AB tailpipes, calipers repainted, rear upper tailgate upgrade, side steps, AB front grille, AB side vents, rear LED lights, clear side repeaters, integrated daytime running lights, LED headlights.
TO DO: color code sills and pillars.

Thanks for the replies. It's on for 21500 at a non franchised dealer, who I know to be reputable and the 3 month warranty is RAC platinum which looks pretty comprehensive, they'll extend it for a year for £560.

Warranty Direct want £850 for a year

as a guide, i got my '07 HSE with 65k on clock, 1-owner from new, rear entertainment, FLRSH, 3-months warranty "thrown in" for £21k and that was nearly a year ago. that was a fair price at the time from a dealer. i know that at BCA auctions, same spec was fetching ~ 22k excluding warranty. Recently bought a 2007 RRS HSE TDV6 for a Pimp-My-Ride-Project.
DONE: Meduza front bumper, AB rear bumper, AB tailpipes, calipers repainted, rear upper tailgate upgrade, side steps, AB front grille, AB side vents, rear LED lights, clear side repeaters, integrated daytime running lights, LED headlights.
TO DO: color code sills and pillars.