Well I now know.
They put one on for $10 so I had to see for myself. I have mixed feeling about it. If you don't have any information at all, it has a fair number of manuals in it. Most can be found on line if you take the time to search for them but it did include several Scubapro models that I did not have but is no where near complete. There are a good number of manuals that are pretty much useless for rec scuba, things like hard hat manuals or compressor manuals and there are a good many owners manuals...not any help for repair. Many of the diagrams are fair to poor quality copies of scanned pages, this is esp true of the vintage regs. The vintage section is pretty weak as well, a copy of Basic Scuba has more information on vintage regs
In addition to reg repair and owners manuals, there is a good bit of other information that does not pertain to regulators, BC or the like. All in all, may be worth the $10 if you don't have any manuals at all and don't care to search for them yourself. In fairness I did pick up several manuals so it was worth the $10 to me, just to help build my library but it is no where near as comprehensive as they would like you to believe.