I bet it's a tough sell at 21k, you can have a mint golf r at that price, what would glass offer for on that?
EDIT:
I took a quick look on parkers at a 61 plate Manual 3 door 35 @ £17,500
All the mk6 prices are dropping like stones, same happened with the mk5's when the mk6 came out
I see 10k mk6 gti's about at the min on autotrader, crazy