In December 2009 I noticed Adobe Photoshop CS4 Extended for auction on eBay. Many copies were on sale, and I followed a few auctions to discover they were trading for around $400 (usual retail is around $1000 - Australian.) Authenticity was guaranteed by the seller, and, though I had doubts as to the provenance of the software, I was new to eBay and decided that they would not permit the trade of any suspicious items on their site. Basically, in my view, eBay's name lent credence to the selle...