Are you sure this was RRL? I'm quite surprised. Anyone else care to comment on the availability of RRL pieces at the outlets?
A few times a year the outlets get RRL stuff.
The big sale happens about once a year when the high-end stuff (Purple & Black label, RRL, Corneliani-made suiting) goes 75% off. The RRL goes fast though--I managed to snag an awesome pair of selvedge denim for $50 and an O-ring leather belt for $30 at the Aurora outlet a couple days ago. The rest of it was pretty picked over.
The outlets are the only place you can find RRL that cheap. Once I found a rack of $15 RRL belts at a random outlet in MI. If there's one in your area, it'd be worth checking out.