My bike resently crashed, the crank was totally gone! I went to the bikeshop in Storcenter Nord close to the university, to get an estimate of how much it would cost to get it fixed. A stunning 600 dkk not including how long it would take them.
I found a number of good sites describing how to fix allmost everything that could ever go wrong with your bike
So I though I might as well fix it myself! Unfortunately what was left of the crank was so rusty that I could not get it of on my own. I went to another bikeshop close to my home and they fixed it in a couple of days for 450 dkk. Nice and not so much dirty work for me :)