PMSL! That's about what it was worth when it first came out!
I have the first edition of the first two books but I'm not parting with them.
There was also a book I read when I was a teenager that I loved, I recently did a search for it and came across a site selling first editions. Well, it transpires that I wasn't the only one to love the book and they're going for, on average, �800!
No way was I paying that, so I did a search on e-bay and I won a bid for a first edition for...........1p!!!!!! *and* the seller described it as mint condition because it was gifted to her, she didn't fancy it and it's been sitting on a book shelf for all these years, she wasn't wrong there, it really is mint condition!
Clearly, the seller didn't do her research and I'm quids in very soon!