Amazon.com is selling the Oz book collection (Vol 1-5) by Frank L Baum for $12.25. This set has been running $30+ for some time and never been below $26 according to CCC.
LIMIT OF ONE PER ACCOUNT.
Also, to make it even slicker, add a book from the link below over $2.75 and use coupon code BOOKGIFT17 for $5 off $15+ book orders, essentially making this set $10 if you find a $3 filler book.
Volume 1: The Wonderful Wizard of Oz, The Marvelous Land of Oz, Ozma of Oz
Volume 2: Dorothy and the Wizard in Oz, The Road to Oz, The Emerald City of Oz
Volume 3: The Patchwork Girl of Oz, Tik-Tok of Oz, The Scarecrow of Oz
Volume 4: Rinkitink in Oz, The Lost Princess of Oz, The Tin Woodman of Oz,
Volume 5: The Magic of Oz, Glinda of Oz, The Royal Book of Oz
As always, shipping is free with Prime or on orders of $25 or more.