I think you could get one for around that if not a bit less. I suspect that the main dealer who ended up with mine sold it for about that back in March, they'd had in since November and didn't seem to shift.
Depreciation is pretty bad to start with a year old Cupra loses around £500 a month, I think it will even out though.
For example I got offered around £14,300 for mine (July 2007 car) last August against a 1st of September delivery TT if I took one from stock. Ended up getting a TT build to order and got £13550 in part ex deal done in August but took delivery in October.
7 months on and I reckon it would now be worth around £11K in part ex.
Personally if you're getting a Cupra for that sort of price it will depreciate but a lot less than a new one.