I might go with the third party option... it actually makes the most sense. While I would love to sell it for anything OVER $1000, I recognize that the book has value to certain people. I still want to be able to capture as much value as I can. If the market takes a dump on my chest with this book... well, that's another story... I will let it ride on eBay for now at the BIN price of $3600 and then if it doesn't sell, I will look at comiclink or mycomicshop or some other 3rd party service.
As an aside, if I sell this thing for $1500 tomorrow, what will that do to the 90 day GPA? People are going to hate me.