Vintage/Retro Courtier 500 Solid Fuel Stove - What's it worth?

I have this retro Courtier 500 wood burner but I can't find any for sale online. Can anybody tell me more about it and what it could be worth?

I found it online here but not for sale:

http://www.vads.ac.uk/large.php?uid=62037

Pictures to follow. The only differences are that mine is teal not silver, and has "Mark 2" appended to the model name.

Thanks