Game Gear - Kenseiden - What's it worth?

[Zanwolf]

Hi all,

First post, so hello to everyone, I'm Zanwolf.

The other day while searching through my attic for my SNES and games, I came across my Game Gear with a game called Kenseiden (no box or manuel, just the cart). I've searched on ebay.co.uk and ebay.com but can only find the Mega Drive version of the game; which doesn't go for too much.
I've tried searching google for the game gear version but have come up with absolutely nothing.

As I can't find any information on the GG version of the game, I'm turning to you guys who know so much about this stuff. So, without further ado, how much do you think this GG cart is worth?

A few details about the cart;
Colour - Black
Condition - Excellent
Status - Still works
Cover Art - 100% intact
Defects/ scruffs/ scratces etc - None

Thank you to everyone.