Sorry but this is complete and absolute nonsense.
I'm sorry, but it isn't - it's the result of my (and others) experience!

Read what Rob has to say.

Richard, you do your things your way; that's fine. But I would not buy and sell hi-fi equipment the way you describe, and I know plenty of others like me who agree

Good luck to those who do it your way, and enjoy it, though!

Marco.