Pillars Of Eternity Sealed Signed Collectors Edition

Hello folks - 

I'm looking for some advice - i'm looking at how much do you think the sealed and signed collectors edition, with t-shirt, playing cards etc would go for on ebay?

I cannot find any listing at all to guide me...I thought you helpful chaps could give me some pointers. I'm not sure if this is a wanted / rare item people want or not. I've been living in another country for 3 years, and only used my digital key to play this. I had the collectors box waiting for me at home and never touched it! 

Thanks for any advice