eBay US is having a 2-day listing special.  You can use 4 listing upgrades for half-price.  Remember, if you use the upgrade, and need to relist the item after the sale, be sure to remove the upgrade or you will be charged full-price on the relist.  Here is the announcement:
 
As a special offer to our sellers, we will be holding a two-day 50% Off Sale for the following listing upgrades on the www.ebay.com site:

The 50% Off Big Upgrades Sale starts on Tuesday, February 7, 2006 at 00:00:01 PT (12:00 AM plus one second) and ends at 23:59:59 PT on Wednesday, February 8, 2006 (11:59 PM plus 59 seconds). Listings created prior to February 7, 2006 and scheduled to start during the promotional period (February 7-8, 2006) will be eligible for the promotional rate. It's a great time to add selling features to showcase your listings and attract even more buyers!

During the 50% Off Big Upgrades Sale:

For auction-style, Fixed Price, and Real Estate/Ad Format listings, the fee for Homepage Featured (for both single and multi-quantity listings), Featured Plus!, Bold, and Highlight will be 50% off. This promotion will not apply to the following types of listings: Motors vehicles and non-vehicles, International, Live Auction, Professional Services, Store Inventory listings and Business & Industrial Capital Equipment. Please click here for full promotion details.

We hope you enjoy the 50% Off Big Upgrades Sale!