Plus if you sign up for their rewards program, after you buy 5 bras you will get a coupon for a free one (and based on how much you spend in a quarter, a % off coupon)
Also, they wash really well - we machine wash all of them, regular cycle - they have survived my frontloader and my older daughter's college machines - we even put them in the dryer and no problems (I do take some of the more delicate ones out halfway through) - one hint is we always clasp them closed before washing - there is less tangling with other clothes in the washer
Right now the discount code 86277041 gets you an additional 15% off online - I would use it sooner rather than later - I don't know when it expires
And there is free shipping and returns on bra purchases
Aerie always has a clearance section, too. Ours is a couple small racks in the back corner of the store. You can even get the current styles, just last year's patterns. Their bras are usually up to $40, but I never pay more than $10.