The Perfect Host, Volume V of the Collected Short Stories of Theodore Sturgeon, is currently only $4.74 at Amazon US.
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I bought this -- its the full book which matches the hardcover I own, with the foreward by Larry McMurtry and the story notes by Paul Williams. Note, there is another kindle listing for $2.49 which is not the same book, merely some out of copyright Sturgeon stories.
None of the other Sturgeon books are discounted, and this beats the next best price I could get for these ebooks (i.e., the kobo price of $11.49 + 35% off coupon = $7.77)