I've seen issues of the first 2 items sell on the bay in the £8-10 each region.
I was about to suggest £10-12 for D.R.Hughes' HW35 Handbook, which IIRC is what I paid for one. Then I looked on the bay and see that one sold for £58 in Oct.2011 (item# 220866262022) , so don't know what to suggest .