Well, I've just recently found out about how to do combo coupons, rebates, etc....
And so far, the BEST deal I've had was when in July I went to Walgreens and bought 4 jars of (Jiffy?) peanut butter @ 4 for $10, then used their rebate program, and yesterday rec'd my Walgreens card with $5 on it. So, two of the jars ended up being free. Does this count?
Then, a little while back, I used two manuf. coupons to get Venus razors. Each pack of 3 cost just under $6. One coupon was for $3 off when you buy one, and the other was a BOGO. So, I got 6 Venus razors (that I wouldn't have bought otherwise) for $3!! It would have cost me over $12 without the coupons!
Are you looking for examples of when using coupons you ended up getting stuff completely FREE? I don't think I've done that yet. But I'm working on it!