Missing Horse Near Corinth, ME,

I placed my horse on consignment at a sales barn in Corinth, Maine around the end of June and told the owner of the sales barn that I was asking 800.00 and to notify me prior to selling my horse. I knew these people and trusted them with my horse so no written contract was formed. Around a month ago we started a conversation with the owner of the stable that we were going to pick up Remedy because he had not sold, we were reassured that he was there and out to pasture with some geldings, on 10/16/2015 we contacted them to let them know we were coming to get my horse, they informed us then that he had been shipped to New Holland, along with 29 other horses, two separate loads, one load went to New Holland and they did not disclose where the other one went but they told me that my horse went to New Holland. They did this without my knowledge or my consent and then lied to us about him still being there when they had already shipped him. After a lot of lies and mixed up stories they finally told me that they shipped him on the 19th of September, they sell their horses to a broker who runs them through the auctions, they told me that they put a price of 400.00 on my horse so he would get a rider but that never happened and I was told that he sold for 180.00. All of this without my knowledge or consent.