I was at Vegas ToyCon a few months back and came across one still MOC and they wanted $8000 for it. I told the guy they are going for about $5-$6000 and he agreed but he had it n consignment and owner wanted $8K.
I got some pics of it. Your's looks good, but the one I saw had less gloss on the collar of cape, it was a very matte finish. That's the only question mark I see for yours. Otherwise, the zip looks like it's good.
Just hosted the images, not sure if it will post here, my first image upload here.