Where to Get Children's Books

I thought it would be fun to share where we get our books.  Maybe you will get a few new ideas and maybe you can share your ideas with me.  I'm listing these in order of preference.

Library
Our local library is a great resource for children's books (and audio books, e-books & movies!).  Most (all?) libraries have a website now where you can put items on hold, renew checked books & even pay overdue fees (guilty here).  We find it more fun to go in and choose books on the spot though.  It's a great way to discover new books and old favorites all in one place.  Best of all, library books are free!

Hand Me Downs
Another free resource is friends and family with older children.  We were lucky enough to receive large shopping bags full of books from a good friend whose children are older than ours.  Some of the books were over their age range, but we just held onto them (in some cases, still holding onto them) until they are ready for them.  We've also brought home a few books from Grammy's house, mostly the Bernstein Bears series that Jack loves (he calls them "the dancing bears"), but we really like to leave most of them at Grammy's house for the kids to discover.  Don't forget to share the love, though, and hand down books to younger friends when you're finished with them.  We have quite a few baby/toddler books that we need to hand down and/or donate.

Library Book Sales
Our local library has a book sale at least a couple of times a year.  Children's books generally sell for anywhere between five cents and a dollar.  The books are usually in well-loved condition, but this is a great opportunity to stock up.  There is usually a flier at the front desk when a sale is coming up or you can check the library website under "Events".

Local Used Book Stores
This one is tricky.  Our favorite used book store carries children's books, but generally frowns upon children in the store (I base this on experience, not store policy obviously).  Also, in my experience, prices vary from store to store.  Sometimes we get a great deal, other times we don't.

On-Line Retailers
I buy so many things on-line these days, including books.  I like Amazon's 4-for-3 deals, especially for gifts.  Even better if you can get free shipping.

Brick & Mortar Stores
Are there any local booksellers around anymore?  I've purchased books for the kids at Barnes & Noble on occasion and Target (impulse buys), but I think the last time I bought a book from a local bookshop was when Colin was a baby and I was visiting my hometown.  Sad.

Where do you get your children's books?  Any experience with eBay, Craigslist or Etsy?