I made one a few years back as a fantasy football trophy, albeit, not as nice as yours. Ive seen similar items on the web go for $150 if I remember correctly. You did a really nice job on it.
I'd definitely pay $150-$200 especially if it could be engraved or "plaqued" with a child's achievement or team's victory score, etc. Would make a gorgeous addition to a trophy case.
Gorgeous piece. Thanks for sharing the construction diagram too! Love seeing how things are conceived.