[ziroshima]

I agree with you. It's been my experience though that tracking down solutions manuals for textbooks is very hard. Presumably because they want them out of the hands of students (to prevent cheating).

[SoftTalker]

Maybe for specific textbooks, but if you just want e.g. introductory calculus with solutions those books are all over eBay.

Or use Wolfram.

[danielmarkbruce]

100%. This is the missing piece in many cases.