We had an RTW a few weeks back that asked, "Where do you buy your books?" and I mentioned that we hit the local library book sales a few times a year. And this is why it's worth it for us to go all the way to Sacramento:
64 YA books for $24!!! And yes, those are first editions of The Poison Eaters by Holly Black and Wonderful Alexander and the Catwings by Le Guin, thank you for asking:
And some contemporaries and a few anthologies/collections:
Of course, most of these have library markings (although once the mylar comes off, so do the markings), but that doesn't interfere with reading them one bit. So if you have read any of these, any nominations of which ones should go to the top of the list? If you click on the photos, it opens them bigger and makes it easier to see what's in those towering stacks.