I'd buy it at that price. I don't think it's special other than St. Patrick's day is over and they won't keep until next year. Stock up.
You could make corned beef. Then make pastrami out of the corned beef. You could also smoke a brisket with a dry rub for BBQ brisket - great sandwiches!
"If you want to make an apple pie from scratch, you must first create the universe." -Carl Sagan