What does a buyer:
1) Description of the principle of obtaining the benefits of the line. And this is not some abstract principle, it is based on the specifics of some sports and works only in certain situations. And yes, the principle will live while alive bookmakers.
2) The system of the game. It is in any case is not ideal, and I give her more as an example. The most valuable is the principle in the manual. And an experienced person on the basis of the principle of self-described me build a system "under him", but for beginners, I think, can be helpful and mine.