A one-edition back version of his book _Introduction to Linear Algebra_ is available for under $30.
I watched 6 or 7 of his lessons, and to be honest, I think they're nice if you already know the subject.
I have skimmed both an italian version of his book and an english one, still didn't like it.
The nice thing about the Schlesinger book is that it builds all of the concepts basically from scratch. Euclid’s Elements are quoted too, in the introduction.
Too bad it has poor examples.
Strang taught me linear algebra. His course -- and I read a couple other books afterwards -- is the only reason I understand it. Not only the how of the techniques, but why and what they do.
I don't suppose there's an english translation of the Schlesinger book? Google says no.