Adds the current bid and buyout price of a single unit below the name of the item in the Auction House. Makes it easy to get an overview of price ranges and to tell the good deals apart from the bad deals.
/up - show help
/up showbid - enable/disable display of bid price.
/up showbuyout - enable/disable display of buyout price.
The slash command /unitprice also works, if /up conflicts with another addon, or if you just find it easier to remember.