This is a niche component, but if someone has damaged the threads on their road or CX crank and is looking for a replacement, I have a brand new Shimano Ultegra 6700 / 6750 left crank arm.
Length: 172.5 mm
Colour: grey
It cost £85 and is completely unused - it has not even been installed. Looking for £50 posted.

Thanks.

Not surprisingly this hasn't produced a massive amount of interest! So, I will be sticking it up on eBay.....

I'm guessing you bought a Stages PM?

That would be a very sensible explanation...sadly though, it is not the case. I picked up a new Ultegra crankset on behalf of a friend...and then, owing to a series of highly improbable events and a snafu on my part, had to buy a new replacement left crank arm for it at very short notice. I then subsequently got back the orginal, unused, left crank arm -- hence the ad. All my road cranks are Campag, so it's no use to me, even as a spare.