Just ordered my MES 40" from Sam's and I'm very excited for its arrival.
I wanted to let new/potential buyers in California or South Carolina know that in those states, it is illegal for stores to charge an upcharge for non-members. In this case Sam's usually charges 10% extra for non-members.
So for non-members in California or South Carolina, just register as a guest, you will get free access for a day. During checkout it will show the 10% upcharge in your cart, however at the very last state the upcharge will disappear and you will only be charged the $300 plus tax and shipping (only $11 shipping for me).
Hope that helps someone.