Definitely Horsemart. Just old mine and bought my new one through them. Although things are only selling at the moment if it is at the right price.
Good luck
Sold mine within a week on Horsemart, but he was priced to sell, and did have a lot of timewasters viewing him.
I think it depends on what market you are aiming for , I think the lower end is still boyant, but the more expensive you go, I think the slower it gets.