Original sentence: The Rockman Sustainor is the basis of the Rockman system.Today, a vigorous market exists for used modules in the Rockman line, with some units commanding a higher price than their original list price.When Scholz sold the rights of Rockman to Dunlop, the manufacturer made many modifications to it, such that it was now designed as purely as a headphone amplifier instead of recording gear
Edited sentence: Some units command a price higher than the original list price.The Rockman Sustainor is the heart of any Rockman system.Today, a vigorous market exists for used modules in the Rockman line.When Scholz sold the rights of Rockman to Dunlop, the manufacteurer made many modifications to it, such that it was now designed as purely as a headphone amplifier instead of recording gear