City Deals is having a customer appreciate sale right now. Save an additional 10% using coupon code WELOVEU. You can go over here to check out their deals. One that can be used around Sioux Falls is Cold Stone. Here's the deal:
$20 gift certificate is reduced to $17
use code above at checkout
Pay just $15.30 for the gift certificate!
There is a $.99 shipping fee, however you can also try to use the code wallflowers for free shipping. I am not sure if you can use more than one code, but worth a shot!