If I remember - as Chris (Tulipone) and I are near neighbours he got it for an excellent price, I actually can't remember the figure - however I do know you won't get either a Tamron 11-18 or a Sigma 10-20 for anything close to what mine sold for.
The going rate for either nowadays is £250+ used I suspect.
Its a very very nice lens, with some glorious colours - I am not sure how, but skies look like you've used a polarizor even when you haven't.
I sold mine when I got wind of the Tokina 11-16 and the Tamron 10-24. Ironically as I've now gone exclusively full frame I never got to use any of these!
I've used all 4 of the major wide angles, and the Tamron is WAY up there optically, albeit with a compressed range.