You've got to watch that eBay fever.
I saw one go for £65 last week that's £14 and in stock at Amazon...
The price drop thing can feel grim can't it, I paid big money for the, then rare, Spielberger book on the Tiger... couple of months later the entire series was reprinted for £40 a shot. Oh well
.
The eBay bargains far outweigh such experiences though, it's a waiting game on there, just about any book will turn up for a decent price within a year or two. Patience, perseverance, and searching in the 'wrong' areas normally pays off.
Cheers,
Adam.