All Packt ebooks are $5 13 years ago
I was asked to be a technical reviewer for a Packt book on a topic in which I had some expertise; the chapters I was sent were so bad that providing the correct feedback would have taken more time than writing them from scratch, so I gave feedback on the first and bowed out -- I just didn't have the time for that.
I was then asked to be a technical reviewer for something I know nothing about. I declined.
Given those two experiences, I'd never spend money for a Packt product.