Seemed reasonable enough though so I spent £17.50(!!!) on a new 6 pin yale cylinder:

Got it back, cracked open a beer ready for a challenge.
The thing only opened after roughly 2 minutes

Im going to take it back to the guy now and see if he'll do a deal on something decent. I'll hang on to this lock though because it's nice and new but still.. wanted something more interesting.
Another one for the collection I suppose
