I wouldn't buy from you just based off of this post.I hope you at least sell the units as used.
I am an award winning Cell phone dealer/ business owner for 14 years.. It is natural that I have a lot of down time so I have my computer set up with all that I need for music and gaming. Yes I slack a lot but this gives me much time to discover gems like the ones you are hearing..I also sell headphones here to my unassuming customers. Basically they get to buy my rejects. Lol!!.. So I can afford to order the occasional dud only to find out they are indeed duds and I quicky repack it and sell them off..To my customers they get some of the best sounding stuff. Your average non audiophile only cares for one thing and one thing only .. MOAR BASS!. It can be as muddy as flabby as they get but. It must be quality if it has bass!.
I was gonna say. You should try out some double flanges..Sound changes quite a bit with different tips more so on the isurus than any other earphone I have. Try this try that..