Victoria's Secret has wonderful promotions around the holidays. Here is a scenario for a great buy on bras. Under $20 for 2 bras, 1 panty. This scenario won't work after today, but I'm sure there will be more.
25PTY for $25 off any two full priced bras and free cotton panty. They have bras 2/$40 and 2/$44 (This code ends tonight)
FA813789 for $10 off any bra
RUSH08 for free lip gloss set (oops, nevermind this is if you purchase a sweater)
Make sure you add the panty in a solid color. The prints don't qualify. If you are having trouble with your order, it is usually the panty. Just play around with your order until it works.
Go through ebates for an additional 2%-4% back.