I see that a first edition of one of my favourite vintage cruising books is available on Ebay. The "buy it now price" of £50 appears high but the starting price is £35.
I bought my copy for £5 with the only bid. It was also a first edition, but it didn't have a dust jacket. Maybe my review in November 2007 has driven up the expectations of the seller, or maybe my copy was grossly under-priced.