3packs of Blue/Red Briefs or Boxer-Briefs for $59. This is about as cheap as they get for a 3pack based on past deals.
Have to get a 3pack of a single colour unfortunately.
After trying a few types of boxer-briefs (Bonds - comfort decreases after a few washes. Step One - too much like compression shorts). I found this brand. Soft, hold their shape, basically you don't notice they're there but they still give you that little bit of support. Have to say that for me they are the best for my thighs and doodle.