previous editions of books on syllabi

[cardsrule]

Does anyone know of some place where one could purchase a previous edition of some of these books? I figure there's probably not much difference, besides correction of errors, and it should be substantially less monetarily as well. Thanks.

[Budder]

I found a great site that gives the prices of textbooks from a bunch of other sites. It gives you a rating (new, almost new, etc) and price including shipping. I got one of the Prob texts recommended by the society from there. It was rated "almost new", for $35. I couldn't tell that it was not new. Some of the sites were selling it new for $110.
The name was alltextbooks.com or allbooks.com or something like that. Sorry I can't remember exactly.

[Macroman]

I have found some titles at half.com at very reasonable prices. It's kind of hit and miss and I'd reccommend searching using something like the iwon.com shopper or deals.com. There are so many sites out there where you might find a title, but it's so like a needle in a haystack.