Amazon book return - not really worth it

Back in August I purchased The Non-Designer's Web Book hoping it would help me out with my current project. As it turned out, the book was useless to me, so I returned it to Amazon. I would have been better off selling the book myself.

Purchase price: $24.49
Restocking fee:$12.25
Promotions: $0.40
My cost to ship back via USPS Priority mail: about $6
My net refund: about $5.75.

What a waste of my time, effort and money.