vsd3s

I've been reading about these and people are giving them 9 rating. Are they better than T-peos tank popular, Soundmagic E10, VSD3S ?

Hi, I am thinking of buying these IEMs. 1. Can you tell me what is the difference between VSD3 and VSD3s 2. I found them 56 USD on lendmeyourears.com/mp4nation.net. Any prior experiences with these websites? 3. The shipping is free. Will I need to pay any additional custom duty etc ? Is there...