Looks to be a silver with drop eye and IMO I wouldn't buy an arowana with drop eye but if you like it and don't mind the defect then offer them what you think it's worth.Not worth much as you can grow out silvers pretty fast and can get small ones for cheap. When I sold my black arowanas I got half of what I paid for them when they were small. Never owned a silver just because they all get drop eye. Best to grow out your own and feed them what you want to feed them not what some owner has them eating.