Quality:

”There is hardly anything in this world that couldn’t be produced slightly worse or sold slightly cheaper by someone, and people, who only look at price, is this man’s obedient victim”

Prices:

“It is unwise to pay too much, but it is worse to pay too little. When paying too little, you sometimes lose everything, because what you bought was not capable of doing what it was bought to do.
Ordinary business sense makes it impossible to only pay a little and get a lot – it is not possible.
If you accept the lowest offer, you will be best off with a good insurance – and if you have that, well then you could afford the better product in the first place anyway”