What's the value of?...

[Nikitaq]

For Sale
Title: StarCraft Collectors Edition
Platform: PC
Region: UK
Price: TBC
Condition: Open but in excellent condition (see images below)
Detail conditions: Everything is in the box, un-worn t-shirt (size XL), keyring (in plastic bag), certificate of origin, even the receipt from the original store purchase.

Here are some images I took to show you the item. I'm trying to find out if this is actually worth anything and hoped you guys might know?