What's the value of?...

[Toasty the Baker]

So I got my hands on one of the Uncharted: Drakes Fortune rings that I believe were given out at PAX 2007(?). It comes in the little treasure box, however, the string that makes it a necklace is missing, as well as some of the foam inserts for the box. Seeing as though there are only 200(?) of these out there, what would one be worth with the aforementioned missing parts? Thanks!