UPDATE: I successfully placed an order for a FitBit Blue Zip at $29.50 plus tax $32.16. I checked out as a guest. Hopefully they don't cancel my order. FYI, the FitBit One is $49.50 with the sale.
On a deal site I frequent they mentioned that AT&T has some of the Fitbits 50% off when you use code FITBIT50. There were some mixed results, some said that it worked for them as a guest others said that you had to be an AT&T customer. You can always try to see if it will work for you.
https://www.att.com/global-search/s...uggest=FALSE&tabPressed=FALSE&q=fitbit#!/All/
From AT&T website:
While supplies last. Online only. Use promo code FITBIT50 in cart for instant discount off eligible accessory. Limited to in-stock, regularly priced Fitbit One and Zip products only.
Limit: Discount may not be combinable with other credits, discounts, and offers, and cannot be redeemed for cash or applied as payment or credit to any AT&T account. Limit 1 per transaction. Other charges and restrictions may apply.