Hi Ajmboy,
SMC in Japan made a deliberate decision not to sell manuals in PDF format (so in other words, any PDF versions floating around, especially those *sold* do violate copyright laws). It's OK (legal) to resell printed manuals. Maybe those are cheaper, but may not be up to date. To pay the extra money you get a legal copy, support the company and are sure to get the most up to date stuff.
- GSM