My old 56 plate with PPP is going for circa £12.5K in Arnold Clark Aberdeen Lang Stracht
It was in great condition and if you gave them a very low offer I think they'd go for it.
It has PPP and is the SL model with leather, sun-roof, heated seats etc
Offer £11k and see what they say........it had 27k miles and FSH from T&C Aberdeen
Nothing in particular to look out for with wagons IMO
Cal