Moved to Forum: Original Link
Dunno if this is should be bargain or a forum topic but here goes. [edit - guess it is a forum topic.]
Pay what you want (even $0) and educate yourself with these textbooks (ebooks) produced by OpenStax College. They're impressive - the physics one is 1,275 pages for example! Other subjects "Coming soon".
"FREE. OPEN-SOURCE. PEER-REVIEWED. OpenStax College is a nonprofit organization committed to improving student access to quality learning materials. Our free textbooks are developed and peer-reviewed by educators to ensure they are readable, accurate, and meet the scope and sequence requirements of your course."
Yes, free is the norm in Education, it seems.
Lotsa free (optionally, but at no extra cost, extendable, ie, just a change of format required, not price) textbooks here:
Now, if you want to watch video lectures, take a Free MOOC, eg, via app Coursera or via EdX.org (& theree are lots more).
KhanAcademy.org has video tutorials & even a new feature, to encourage folks to go on to university.
As long as you can read & understand English (or other MOOC languages), there's no reason NOT to educate yourself, to some degree.