Pretty rare that you can buy discount lift tickets for the big Colorado resorts.
The only problem with this that I see is you have to know your days. They aren't just selling a ticket you can use any day of the season, unlike Loveland four packs. So that is pretty lame.
Still, if you know when you are going to be at Winterpark, this could work for you.
Here is the link: Winter Park Resort
You have until January 30th 8am Mountain to buy at these rates.
Have at it.