Hadn't ordered from BetterWorldBooks for a while and got an email saying they missed me and wanted me back :)
The email:
Remember when we used to hang out together? You browsing books and supporting literacy with every purchase… us sending a book to someone in need every time you bought one? Good times, good times.
But wait! It doesn't have to end. If you can find it in your heart to visit us again, we'd love for you to have this 20% off coupon, good for 2 used books that ship from us. Just use the code WELCOMEBACK at checkout to receive your discount. We can't wait to see you again.
The terms:
Offer is valid on ALL USED BOOKS that ship from our warehouse.
Offer is not valid on new books or books that ship from other sellers.
Discount code WELCOMEBACK is required to receive your discount.
Offer ends at Thursday, August 18, 2016 at 11:59:59 PM EDT.
Offer does not combine with other promotions.
If you're not sure if a book is on sale, you can look for the seller name for each book when you view your cart. The seller name must be "Better World Books" for the discount to apply.
Doesn't seem targeted — was able to go through checkout as a new customer :)
Thanks OP, got 2 manga volumes I've been meaning to get for a while.
What's the range of quality for the used books?