This is a good point. I know people who don't buy new books of anything on principle. When asked about it, they usually say something like the following:
"Those stupid new books! They're all just sitting there being all smug in their new-ness! Just the other day I saw this book in the store, and it was all cool and all, but then I realized it was a new book and I was all like 'oh look at you! You think you're so great just because you're a new book huh? Well guess what? I don't buy frickin' new books! Get your paginated ass to a used bookstore and we'll talk!' and I totally walked outta there! 'Cause someone's gotta take a stand against all these new books takin' over!"
Odd I havent seen that soo much. I buy lots of new books. Just the other day my pathfinder subscription came in the mail. I think the real concern is when the new books suck a lot more then the old books because a company is trying to redefine the game.