Bought mine for Christmas for $79 using a $20 off purchase of $100 coupon (just buy a candy bar in the store to get it over $100).
Here are the current Northern Tool discount codes. Also if they are out at your local store, just have them ship to store for free. And I'm 99% sure you can use the code today, and then again before the expiration date (same code for everyone). I think you have to have the coupon to get the discount in store, but again if you order online, just type it in at checkout and you are good.
If they run the 5# stuffer on sale again use the $10 off code (I got mine for $59 that way).
155709 - $5 off $15
155708 - $10 off $50
155707 - $20 off $100
They all expire on the 2/16/13