Explain Windows 7 Key Purchases. Difference from store bought? I don't understand how this works. Have small business and would like to buy 3 of Windows 7 for 3 computers. These are $100+ each in stores, but can buy keys on ebay of Prof. edition for $50 each. I've always waited for Windows to be out a couple of years, then buy when cheaper (3.1; 95; 98; XP). I don't understand the new purchasing schemes with Windows 7. Can someone help me out with an explanation ? Question: What exactly is a key purchase...do you get the disks, or just the keys...if you just get the key, then how do you get the program...etc.? Thanks PS. Been purchasing from ebay over 10 years, and the 2 probs. that occurred were resolved in my favor by Paypal. I'm not worried about ebay.