Occasionally they have coupon's that bring the price down, but even every day they're $12.50. I've purchased them as low as $3 for a $25 coupon
The catch, you can only use 1 a month, and I don't think they apply it to alcohol sales. Other than that there's no day/time restrictions or anything
I suggest you check them out and if you haven't tried Bailie's yet maybe this will be a little incentive

http://www.restaurant.com/
For the record, I don't work for either of these guys, but I do enjoy popping down to Bailie's for an appetizer and a glass of wine. The food could use a little improvement for the price, but the service has been consistently good.
-- Mylo