Your piece may not even be worth bigwulls findings or ebay results as much of Heinrich Hoffmann's pieces have been reproduced as copies of poor quality marked and sold as original pieces. Especially where you did not post clear good photos of your piece. Flooding of the market with new and poor quality copies also brings down market value of the original valuable pieces. Plus collectors are a fickle bunch and the slightest flea bite can bring value significantly down. Like KC said Many factors go into determining the value it can no longer be determined by a price guide.