I cam across an advert at the top of my Googlemail page today for cheap software. A quick survey of the forums suggests that a download of Adobe Photoshop CS3 for £19.50 from www.pick-go.com is a scam.
Experiences seem to vary from paying and receiving nothing to others who have received a fully working copy with updates. The general opinion is that the serial numbers are keygen generated and are probably volume licence keys which do not require registration but are eligible for updates. Interesting to note there are no contact details on the site. Further comments here.