Its a chrome extension and fire plugin that automatically finds the best coupon codes, tries them all and selects the best price coupon code for you to use.

Works on godaddy, bought three .99 cent domains earlier today. Also works from amazon, newegg and bunch of other good sites we all frequent.

Spoiler (Click to Hide)
1.- Go to http://joinhoney.com/?r=chrome download and install the extension.
OR for Firefox go here http://joinhoney.com/?r=firefox
2.- Go to godaddy and pick your domain/domains and go to the checkout page like you normally would
http://i.imgur.com/qdCdEfX.png
3.- If you installed the extension correctly, you should see that orange button at the buttom that says "find savings", click it and the magic will be done.
http://i.imgur.com/hHh4QLO.png
4.- Wait until it test all the coupon codes and gives you the best one
http://i.imgur.com/gybSYT1.png
5.- Buy it