CVS has Robitussin on sale for $4.99.  It’s part of a group of Buy 2 products get $3 in ecbs  – there’s a $3 coupon in the 9/30 rp, which brings it down to slightly over dirt.

I bought two, paid $3.98 and got back $3 in ecbs, or 49¢ for each bottle.  Next I bought four bottles for $7.96 and paid with the coupons and $3 ecb from the first transaction.  OOP was slightly over $5 and I got back $6 in ecbs.

Note that this deal is limited to FIVE per card (or ten bottles of Robitussin).  I’d call this a stock-up sale because we’re going into the cough and cold season and the expiration dates on these bottles are late 2013 and early 2014.

and yes, obviously you can just buy in sets of two and only put out the 98¢ instead of accumulating ecbs, but if you’re trying to roll some expiring bucks, this is the way to go.