You may be lucky and get £2000 trade-in, as they are selling for between £2000-£2500 for that year/mileage. Try them and find out, nothing lost, just be assertive with the salesman or they will reel you in once hooked!
If I am still looking in the New Year I ll take you up on that.
This one I am looking at is Birmingham area I think. I am back in Bristol until New Year give or take a day.
I am not 100 sure on the prices for diesels but the search only came up with 19 so I guess that pushs up prices.
I could go for another 120, 180 are out of the question changing to a diesel will save a min of 10 pounds a week, so that why I am looking down that route.
About right for price IMO the diesel ones hold their value really well. only thing it doesn't say is mileage which might effect price. I mean i searched for 6 weeks to find mine as you say there are less on the market out there. Only thing i will say is check and make sure it is a 115. the lower powered one isnt bad but once you have driven the 115 version it is noticeable.