>It cannot be 'pirated' if the product is authentic
I shouldn't have said pirated I should have said illegal. Even if it's Authentic, all Microsoft OEM software licenses say that this product is not for resale. By buying or reselling OEM software, the buyer and the seller are breaking that license agreement even if it's in a sealed envelope with a MS hologram CD and MS certificate of authenticity. You may have an Authentic software but the licensing of that product is not legal.
For example, since I work for a MS partner I can buy from Microsoft Canada a full version of XP (not the upgrade) for $83 Cdn. It's a sealed box with a certificate of authenticity from Microsoft Canada. However
Future Shop.ca sells the same thing for $479 Cdn. LEGALLY - If I use it then it's legal, however if I sell that box, it then becomes an illegal product.
Having said this, MS has bigger fish to fry. It's not in their best interest at the moment to pursue those that think that they have authentic OEM software but it is in their interest to pursue those that are selling illegal software in mass.
Here's why you got it for $30. I used to work at a place where we had over 400 employees/computers every time we purchased computers to replace older ones, they came with OEM OS and Office software but we installed the OS and Office suites from a network install leaving 400 OEM sealed licenses, we collected them and put them a box and stored them. Lot's of companies do this, now comes the unscrupulous employee who finds a box with 400 OEM OS and Office licenses and see gold. He then goes on ebay and the like and starts selling them at incredible low prices over a period of time. 400 times OS and Office = 800 x $30 = $24,000. This guy just stole $24K and leaves the entire company running what they believe is legal software. It also leaves the buyer who bought an Office suite for $30 thinking that he has purchased legal software when in reality the owners of that software is the company.