almost any magazine will have H-F coupons
4 Wheeler, Hot Rod, Woodworker's Journal, American Woodworker, Guns and Ammo, etc. anything that may require tools is fair game for the H-F coupons.
However, you want the one that has the spindle sander coupon, a woodworking magazine, and you'll have to "browse" through some of them to find it. It should be on sale for $89.99 , a "super coupon" what ever that means...
The 20% off any item coupon may give you the same discount, it depends on the price they quote before the discount. I have that sander and it's a great buy and works fine. You can get the sanding sleeves at H-F pretty reasonable also.