Sholes took this advice and set to improve the machine at every iteration, until they were satisfied that Clephane had taught them everything he could. By this time, they had manufactured 50 machines or so, at an average cost of $250. They decided to have the machine examined by an expert mechanic, who directed them to E. Remington and Sons (which later became the Remington Arms Company), manufacturers of firearms, sewing machines, and farm tools. In early 1873 they approached Remington, who decided to buy the patent from them. Sholes sold his half for $12,000, while Densmore, still a stronger believer in the machine, insisted on a royalty, which would eventually fetch him $1.5 million.