HandHeldItems cuts 30% offSamsung i9300 Galaxy S III cases via coupon code "galaxys3". Even better, most items come with a $1 or $2 HHI Store Credit. With deals starting at $1.91 after coupon, that's tied with our December mention as the best deal we've ever seen for Galaxy S III cases from HHI. Shipping starts at $2.85, although select items are eligible for free shipping. Coupon ends March 15.