For ease and convenience I normally sell my old phone using an online 'we but your phone for a fixed price' like Mazuma or Envirofone. I could probably reap slightly more from eBay but after their fees the slight profit isn't worth the hassle IMO.
The best price I can get is currently £186 (iPhone 5 64gb).
However, that is for used condition which almost every site states 'no cracks'. Mine has a very small crack which is not on the viewable screen. It's less than an inch long and is just below the sleep/wake button.
I've looked into repairing it myself and it looks very easy; 5 screws in total. One guy on YouTube does it in 3 minutes.
Anyone done it? Is there a danger of me killing the phone and making it worthless?
Having just researched a little more I might just bite the bullet and get it fixed by a pro. I can get a screen cheap enough but (as you say, Bockers) the cheap ones don't come with the attached bits which make the repair that much harder.
The cheapest fully assembled screen I can find is £43 and there's a company who will replace the glass and give a warranty for £46. So it seems like a no brainer.
Either that or I might see what I can get for it in it's current condition from one of the 'we buy any phone' type companies.