How can people sell a, for example, MacBook Pro LOADED with thousands of dollars worth of software for $2265 or some such ridiculous price? I see ads like this all the time on eBay and Craigslist. What's the low-down on this? Is this just illegal software? Does the software actually work? I have asked sellers if disks came with it and have received answers like, "the programs are loaded on the computer, there are no disks but you can backup your harddrive and always have the S/W". What's really going on here? Thank you!