Hi chaps

I have no knowledge or experience whatsoever of sequencing but I'd like to give it a go and am a whisker away from buying Cubase 4. Looking at prices, the cheapest I've seen is on this site - http://www.dv247.com/invt/40439/
but I'm not sure what the "Last ever crossgrade stock" bit means. Is it safe for me to buy this one?

Also, if I purchase Cubase, would you recommend the beginners' tutorial and/or the book mentioned on the above link? Anything else that anyone would like to warn/advise me about? All info greatly appreciated.