Just got this e-mail from Gamestop:
It Must Be a PowerUp Rewards Pro™ Exclusive!
It's a mobile gamers dream! For a limited time, PowerUp Rewards Pro™ members can get a brand new 3DS for only $99* when you trade in your old DS Lite, DSi or DSi XL between Friday, August 12, and Sunday, August 14.
This hot deal requires a coupon, but we've got you covered! Look for the coupon Friday, August 12* in the Active Offers section of your PowerUp Rewards account. Simply log in, print your Pro members-only coupon, and get to your nearest GameStop store to take advantage of this offer.
Even if you don't own a DS system to trade, you can still take advantage of an awesome price drop! Upgrade the way you game to start playing in glorious 3D without 3D glasses. Get your 3DS for the low price of only $169.99.