Use the Coupon Code ONEFREE to receive one of the Baby Slings on their site for free. You just have to pay S&H.

https://www.sevenslings.com/index.php/cart

In addition to the Coupon Code ONEFREE, you can also use the Coupon Code THANKSGIVING to receive a free baby sling from SevenSlings. You just have to pay the S&H.

If you are interested, see the link in the above post.

You can now receive a free Baby Sling when you enter the Coupon Code JILLIAN at checkout. S&H is still payable, though.

If you are interested, see the link in the top post.

You can now receive a free Baby Sling when you enter the Coupon Code MOTHER at checkout. S&H is still payable, though.

Here is another link as well:

http://www.sevenslings.com

Update:
This offer is available again for Valentine's Day with a new Promo Code:

Valentine's Deal: Free Baby Carriers at SevenSlings.com!

Use Promo Code "VALENTINE"

It's as easy as 1-2-3!
1. Go to SevenSlings.com.
2. Click on "Shop Now" and select any baby carrier you like, be sure to visit their sizing page to get the correct size.
3. Once you have made your selection, you'll automatically be directed to the shopping bag. Enter the promo code VALENTINE and SevenSlings.com has agreed to deduct 100% of the cost of the carrier - all you pay is the shipping fees!

If you are interested, see the links in the above posts.