Sounds about right looking at AutoTrader.
You got the reg? Just stick it in WBAC and see the valuation. Add £2k to that and that should give you an indication of it's value.
Obviously wont have EGR or DPF issues, but there is a constant scare from the Government about cracking down on illegal DPF modifications, so something to bear in mind.
Would want a fair bit of cash on the side for any potential issues at that mileage too personally...