As of 2015, the average price of pre-owned horse trailers can range from $1,000 to above $50,000, depending on the type, size, and age of the horse trailer. Pre-owned horse trailers are often priced based on pull type, size, age and material.
One of the most popular types of horse trailers is a slant load. According to Costhelper.com, slant load trailers can cost between $5,000 and $30,000. The exact price will depend on size and material of the trailer. Pre-owned straight load horse trailers typically range from $5,000 to $30,000. The cheapest type of pre-owned horse trailer, a basic livestock trailer, typically costs between $1,000 to $25,000.