New member here... thought I'd pitch in on this one! The Lexus with 15k miles was on eBay a few months back and I think the auction ended at around £7k. The story on the listing was that it had been sat in a Central London underground carpark for a long time hence the super low milage. Guy selling it seemed legit and said he'd acquired it as part of a job lot of cars/vans. I bidded on it as I thought it looked like a good deal but it went beyond my maximum.
Personally I think £12k for it is too much as there are better, newer examples available for less money (albeit with more miles)1
I've been on the hunt for a 450h for around 4 months now...still hoping to find an 08 facelift with around 100k on the clock for less than £6k!!