May I ask where you are located? I don't plan on selling mine yet but, if you live in Singapore, there are several preloved sets on sale on the asianparent forum and kiasuparents.com. We live in the US and so I got my Wo Hui Du and Reading Lads books from Chinasprout when they were having a sale. If you're in the US, check out Chinasprout periodically especially right before Chinese holidays because they usually have sales going on. As for the Taoshu books, I emailed the publisher directly at
[email protected] and they gave me 15% off for ordering all 4 volumes. My daughter learned to read Chinese using the Wo Hui Du and Reading Lads books and the Taoshu and Shapes books are perennial favorites at bedtime (She can read most of them independently now). I can't recommend them highly enough!