Don't get hung up on the age. "2008" seems a bit arbitrary ?
2000+ will bring you into 4 stroke territory and there are many well looked after rarely used older boats. This ain't a car your looking at.
However as others have said your probably going to have to go the wrong side of 10K for a decent 4 stroke 150 ish 6.5 meter and you've go to be willing to travel at least UK wide.