i have bought mcv sonar rdas from dragonsden vapor and the serial vapist only to get damaged, unusable clones that were sold to me at FULL authentic value! DO NOT BUY! I tried to inquire and neither company has gotten back to me! Both are supposed to be reputable sites but this is sketchy behavior. I will advise everyone i know to stay away and the serial vapist alone is especially shot. I asked them before i bought it if it was authentic. They told me it was and itd be inspected before it left the shop. Now they wont answer me when i get it and not only is it a clone, but its broken... totally shot