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how much would any one pay for a limited piece of artwork won in a gw painting competiton
of the front page of the marine codex ( it has no writing on just the picture)
i mite keep it but if i can make a pretty penny of it on ebay or the likesto help build my army.
"He that fights with monsters should look to it that he himself does not become a monster"
Decide how much you want for it and sell it on ebay with that reserve price.
Terminator Based Custom Chapter
My advice is to check for recent similar auctions. They usually can give you a good idea on how much you can expect.