In my experience with buying a backhoe - nice ones come up rarely and when they do, they are always over your budget. £2k over isn't bad to be honest, mine was 15k more than my very top end

If you don't buy it, someone in Poland will. These pre stage 4 emission machines are very sought after and to be honest if it was a JCB it would have sold in hours - that's from my own experience of looking for one for months and being on secret lists of serious buyers that get called before machines are even advertised. Regy had a few buyers lined up for mine if I didn't buy it, I'm grateful I got the chance first.
If its the spec you want and is tidy - offer him and buy it! Its not going to loose much in the next 10 years is it!
Plus we need more backhoe owners on here. Owning a 3tonner with tilty has become too popular