If you are purchasing 'left handed scissors', make sure they are a truly 'left handed'. They blades are set up the opposite way on true 'left handed' scissors. Many scissors that are advertised for lefties aren't really left handed. The following website explains why lefties have so much trouble with right handed scissors. They also sell a wide variety of other left handed products and it's no problem to ship to the US.
http://www.anythinglefthanded.co.uk/.../scissors.html