If you buy a new manual from Helm, all the pages will be clean and nothing missing. Also, the Helm website sells the "production" version with the red covers and if there are any supplements for your particular year, they will be included.
Sometimes on eBay, you will see manuals with white covers. These are "preliminary" versions and do not have the final up-to-date information.
The Helms manuals are model year specific so you'll want to get the set for your particular car. As others have said get the red cover books, the white covers are preliminary and don't contain all of the updates.
Depends on your model year. I have an 85 and Helm didn't have the original 'red cover' version, the only thing they had available for that year was a photocopy of the 85 original manual. Just as good as original, and unfortunately the same price. It's the 'white version'..sounds like a Beatle album