This deal seems like a scam. After clicking on the link to join prime (free 30 day trial) (and the only way to purchase) the 2 pack of whitening pens are only available to buy from amazon directly for $19.99 with a $3 off coupon applied at checkout. Not $12.59 like advertised.
The $12.59 is through Woot, not Amazon…
If you login to Woot through Amazon, then you can get the free 2 day shipping offer on Woot, as well as pay $12.59
We offer free shipping with Amazon Prime. Not 2-day. 