Charles Drain was certainly up to £40 at one point, at least in London. I agree that it was a plentiful cut-out for many years, but then seemed to vanish. Plus it is a pretty good album all-round.
As was pointed out on another thread, ebay seems to have led to a depression of old soul album prices with the exception of a few notable examples were supply always seems to lag behind demand. Gloria Barnes was cited as an example and its a good one too.
The levelling out of prices is great for collectors, but tough on those looking to sell. Chris's list above (and those in the previous parts of this topic) includes some fantastic soul music. "True Love" by Townsend, Townsend & Rogers and "Sail Away" by Jerry Butler on the albums above are tremendous pieces of soul music: certainly worth owning by anyone on this board.
The smaller dealers who can't afford to carry large inventory will probably end up not stocking these types of "non-rare" album any more. A shame in some ways as there used to be a network of collectors who swapped tapes etc. and spread knowlege of this type of soul record which seems to be disappearing. What young collectors there are seem to be drawn to the 45 only, which is only half the story of (particularly 70s) soul.
Maybe we should have a media day of great album-only tracks, perhaps with written reviews. It might be enlightening.