You'd be surprised at what you're missing ... but there's a difference between a "commercial service" and those who provide truly high quality scans made on top quality equipment.
Shel > [Original Message] > From: Kenneth Waller > I got tired of paying ever increasing prices for scans and bought a top end Nikon scanner a few years ago. I get great scans by just pushing the button. I don't think commercial operations can give me a better quality scan.