The Crocs Buy One Get One free sale is back on items in the outlet. I also just got this code from Crocs for an extra 10% off: NEWYEAR10 or C6VMRVKY3ISA or CROCSAFF10. One of those should work to save a little bit more.
Shipping is free and I tested this on the little Georgie boots, which are $14.99 in the outlet and with one of the codes above it should come out to $13.49 for 2 pairs or $6.75 each! What a deal!