Hello and thank you for contacting us. This is Dwayne B. and I’m an expert here and looking forward to assisting you today. If at any point any of my answers aren’t clear please don’t hesitate to ask for clarification. Also, I can only answer the questions you specifically ask and based on the facts that you give so please be sure that you ask the questions you want to ask and provide all necessary facts.
Theft is illegal no matter the amount, so whoever told you otherwise is just wrong.
Unfortunately, there is no way to make the police pursue a case.
There are a couple of avenues you can pursue.
The first would be to go and talk to the District/State's Attorney directly and explain the situation. Since they're elected many times they are willing to get involved and try to push someone to pursue the investigation and the DA can actually file the charges.
The second would be to file a complaint against the sheriff with the Attorney General
of your state. However, I've never seen anyone actually get results by doing this but in theory it could work.
The third route would be to pursue a civil lawsuit for an injunction to prevent the sale of the saddle, the return of the saddle or, alternatively, a judgment for the monetary value of the saddle. You can also ask for punitive damages
but you never actually count on getting those.