With June exam being only 10 days away and December exam being even further away, I wonder if anyone would be selling you the books at this time. Personally, I think the books are too good to be sold. However, most of the material in those books cover the topic you can find in books of Finance. The cover some Statistics, Economics, and Accounting. The main thing unique in those books is the chapters on Ethical and Professional Standards set forth by the CFA Institute.

You may want to post again sometime in June/July. If you don't find a seller, you might want to study the Finance books for a while until you register for the exam and buy the books directly from the CFA Institute.

Hope this helps.