Value?

How do u value 1st editions ? How far off am I with thinking this is worth 300$

$180 to around $249 on eBay but that seems way high compared to GVN and price charting.

edit: new guy here though, a more senior member may give a better estimate.  

Sticker seal black boxes in excellent condition are demanding a premium these days.
 

A wasted sticker seal box is in Ebay completed listings for $260 BIN (sold by a reseller who marks games at a premium), which would make yours for $300 seem like a bargain. The premiums people will pay for demolished games of the right variant astounds me. If anything deserves the premium it's nice boxes like yours