The corporate version of XP is legal if you are a corporation and can afford to pay for the number of licences you require. These may come in 25 or 50 or 100 user. If you are a home user or a small organisation then you will not be able to afford a corporate version of Windows XP. The only way you will be able to get hold of one is illegal!! YOu are correct in your statement that XP Corporate edition does not require activation but if you are thinking of buying fron ebay it should cost you several hundred if not several thousands of pounds.