AFA scares the hell out of me. Not because they grade stuff, I suspect they do a pretty darn good job of it. But I don't trust them.
A friend of mine from snowtroopers.ca and a guy I've traded with a lot lives up in the Yukon, so he's a fair piece away from them. He sent in one of his toy fare Vader's to be graded. He got it back, around AFA70 which is pretty poor, but not all that surprising considering how the fan club packed them up, ala Amazon.com. The problem is that this guy is positive that AFA sent him back the wrong Vader. He knows his didn't have certain markings that it came back with. He commented and AFA responded that they received it in that condition due to his poor packing job. That is utter bullsh!t as I've received his packages before and they are packed well and carefully. The guy's an anal carded collector. His assertion, with no recourse, is that AFA flipped him an inferior Vader and took his.
So, due to my overwhelming cynicism about AFA, I grade yours as a 60.
I completely agree with Matt, this is one of the very, very few modern figures that merits an AFA rating. The other two HTF FF would be others, Toy Fare Vader, Jorg Sacul, maybe Dagobah Vader with Secret Luke sticker and if by some miracle, you found an Ephant Mon that wasn't bent in some way. Anything else?