I'm not aware of the 'True Crime' genre, but you'll obviously be getting the whole of Round the Horne to head the comedy zone. Norman Wisdom's auto biography is guaranteed - even if you don't think you'll like it, you will.
The charity shops are a good source, but usually on cassette, although the odd CD will turn up now.
I have a fair number if you let me know what sort of thing you might be interested in, and I'm on your route into the metropolis....
My stuff is mostly comedy and classic novels, but there's a lot of odd items, too - e.g. I have an unabridged reading of Das Boot.