Gilt Groupe is a members only online "flash sale" site for higher-end goods. They sell discounted items, up to 70% off, in sales that usually last 36 hours.
I've been a member of Gilt Groupe for quite some time, although it's rare that I actually make a purchase. Last week I received an email that offered me a $25 Gilt credit. I figured that I could use it to get a Christmas gift for Joey. They had just opened a Melissa & Doug boutique and I was easily able to find something for less than $25. I purchased the Melissa & Doug Slice and Bake Cookie Set, which was listed at $16, and shipping (which could be included in the $25 credit) was $7.95. So it was absolutely free for me.
Melissa & Doug Chef Role Play Costume Set, which was $25. Gilt was also offering a free shipping credit if you invited 10 friends, which I did, and therefore paid absolutely nothing!