What price do you usually pay for a book? What is too pricey for a book? And if a book is priced too low do you automatically assume it is a piece of junk?

I buy one at goodwill there a good price.

At library book sales, I pay $1-2 for a book. That's the kind of price I like. They're usually all in good condition too.

At used book stories, I expect to pay under $10.

Sometimes I will buy brand new books, but it's rare. I recently did because I'm afraid this bookstore will go out of business. So I paid $35 for a brand new hardcover of something I've wanted to read for a while.

But for the most part, if I'm buying books that aren't textbooks, I'd want to pay $10 or less (and the majority of the time, I buy used). 

Last few I bought were at Target wit 20% off. I also tend to buy paperbacks, so that keeps the price down. So I generally pay less than $10. And I never base a book on the price.

I pay anywhere from $5 - $20 depending on the book.  Most times I order them from Bargain Books mail order catalog.

I don't buy them just for price, I get whatever sparks my interest the most. Just because they are cheap in price doesn't mean they are cheap in content.