Pentax DA Fish-Eye 10-17mm F3.5-4.5 ED (IF) Lens

Since moving to full frame shortly after buying this lens (I know, what was I thinking!) it has hardly been used and is as good as new. I am thinking of £249.00 given its condition and a new version is £449.00. It comes in the original box, end caps and soft case. I have been reluctant to sell for now because it is actually a beautifully made lens, but here are some photos plus a couple of examples on the K50: