People don't buy solely based on production quality. Information is MOST important. What good is a hot-looking production if the information just isn't there?
A couple of examples are Perfect Aim, Schmidt's 245, Banking with the Beard, etc. All sold pretty well and were home-made.
Not down-playing production, but it's definitely not the driving factor when making a video purchase.
What he said.
I just bought Schmidt's 294 DVD. Sometimes you couldn't even tell what ball he was shooting, and in the commentary him and Marop would say things like "now you shoot the dark ball in the corner and get shape on the orange-ish ball in the side for your key ball".
The quality didn't take away from the lesson in the slightest. Great DVD, learned a lot!