The System 700 from 1976 was the most expensive instrument Roland ever made. A comprehensive, semi-modular monster that was at the cutting edge at the time, the full system cost the equivalent of around £35,000 - £45,000 (around $45,000 - $50,000) and as they made so few of them; they have been known to sell for even more than that on the rare occasions that they emerge on the second hand market.