Just a word of caution to anyone hoping to cross an MBA card over to PSA. I purchased an MBA 3.5 Silver Diamond Mantle from Greg Morris Cards on eBay. I set the minimum grade requested as a "1."
PSA rendered its opinion and shipped the card back to me for $183.99, rejecting it as altered stock:
"Your order did not crossover because it did not meet your minimum grade requirement that you set, meaning our graders are of the opinion that your card did not meet the standards of that minimum grade or higher. They do not come to this conclusion lightly, and more than two expert PSA Graders inspect your item, and they both must come to the same conclusion. According to our graders, there were signs of alterations on this card, and the only way to have had this item encapsulated was to set your minimum grade to authentic."
I don't have any additional details because there are no grader notes. I just wanted to let people know that PSA and MBA are clearly using different criteria to identify alterations.