I've got the famous SAS/C compiler for sale on eBay:
http://cgi.ebay.it/ws/eBayISAPI.dll?ViewItem&item=150436175469&ssPageName=STRK:MESELX:IT
Just as new condition!
Pay attention for shipping costs: it weights 3,7kg!
(ask me about shipping costs via eBay)
Have a good bid!
Manuals are nice to have, but this software is available often on eBay and other auction sites for a fraction of what you are asking for it. Good luck with your auction, but the price seems a bit (or more than a bit) high to me.
I also think that this software was available for free on one or more Amiga magazine cover disk or CD some time in the past.
