Just noticed this on the "Your Cart" page.

For UPS Signature Required, $2.00 per order, use SGN coupon code.
UPS Signature Required, $2.50 per order, use SGN coupon code.
*UPS Require Signature for Packages:
Use Coupon Code SGN($2.50) in the box to the left.
So, is it $2.00 or $2.50?