âAdvertisement promoting the Imperial Academy. An Imperial Academy was a military training program run by the Galactic Empire, and primarily focused on training both the enlisted and officer corps of the Imperial Military.
People have created accounts and bid on their own stuff to try to raise the price. If caught, they are deleted from the system by E-bay. As many people wait until the last few minutes to make a bid, it is probably the surest way to win something.
If you want to cancel a Best Offer, use the Best Offer Cancellation form. If you won an item and you no longer want to buy it, you need to contact the seller. A bid on eBay is considered a contract, and you're obligated to purchase the item. Read about changing your mind about an item.