June, 2015 is when I discovered Vinh, when I realized that my favorite US supplier would not be offering the Noctigon Meteor M43vn XP-L.
So, the first reason why I went with Vinh was his providing on-time wide variety of offerings.
2. Supply and support stateside, no months long slow boat to/from East Asia.
3. He does mods that I can't do: Boost and choice of alternative emitters, etc, etc.
4. Prompt, friendly attention to infrequent hiccups.
5. Prompt, friendly response via email.
6. Heartfelt, personable, spiritual presence on the forum.
Please see: https://budgetlightforum.com/t/-/58383 245 posts, 11,101 views in this forum.
And: https://budgetlightforum.com/t/-/54450 334 posts, in this forum. And others similar.
I am not sure about paypal specifics. You can email him and ask him.
And last, but eventually most, 7. After buying 26 lights from Vinh in the past four and a half years, and after lots of friendly, helpful and personable emails and one friendly, brief instant answer phone call, I consider him to be my very close to primary spiritual asset/spiritual connection in this phase of my life on the sometimes hostile surface of this earth, painfully impacted by evil people.