I was looking at one last year or so, which I ended up passing on - the money wasn't right for me for one, but I think she went for about $150 and $50 shipping, so $200 altogether? The one I was looking at had mild yellowing too, and she was out of her bag, but I was told that minor yellowing is pretty standard for them.
I think you can ask more if they're MIB!
I'd love to have one, someday! Hopefully I'll catch the next one that goes by!
It's a great idea to sell her in person, since shipping alone would be a killer! I bet you could charge a little more, simply because they won't have to pay to ship her, and that's part of the high cost for her. Just IMO of course!