Not all products are created equal. In fact, that is probably the driving motivation behind your decision to sell affiliate products: for the most part, you have accepted that there are plenty of high-quality products already on the market; and, if you create your own, it might not compare favorably.
If you decide to pick your product off of a list on Clickbank, select very carefully. Rather than haphazardly selecting the product with the highest commission, look for ones that have the highest popularity and gravity ratings. If a lot of people are buying them often, they must be better than other products for sale within that niche.
Your Private Label Rights Terms & Conditions
[YES] Can be sold
[YES] Can offer Resell Rights
[YES] Can offer Master Resell Rights
[YES] Can resell Private Label Rights
[YES] Can be edited
[YES] Can put your name as the author
[YES] Can be broken down into articles
[YES] Can be used as web or e-zine content
[YES] Can be added into membership sites
[YES] Can be sold in any format
[YES] Can be packaged
[YES] Can be offered as a bonus
[YES] Can be sold on auction sites
[YES] Can be published offline
[YES] Can be given away (in any format)
I Suggest You GIVEAWAY The Ebook In PDF
THEN Upsell Transferable PLR (aka MASTER PLR)
Directly ON The Delivery Page AND Inside The Ebook Itself