Depending on where you live and how much you buy, one of these codes will be better for you than the other.... If you are not sure which coupon code is best for you, you can call them and ask how much shipping will be. They can also take your order on the phone... Its a very trustable website/company to do business with...
If you want 15% discount for anything on the site, (except for already discounted item), the coupon code is PFSDgeek
If you want free shipping for orders over $50, the coupon code is WNBD