I've had good dealings with the seller that is in question. I've bought stuff from this person without any issues and vice versa.
juice is something that just because one person doesn't like, doesn't mean that someone else won't. I've had my fair share of terrible tasting juices that my neighbor loves.
In the negative feedback, the seller lists all of the juices which are name brand. Also states, and I think he meant, 200-300ml's total in the sale. I can see where it may be misleading but you had the right to question before making the purchase to get a closer total in the amount of juice that was for sale.
As for buying juices from another person, I have no problem doing it. In fact, I've found some of my favorite vapes by doing so.
Sorry you feel as though you have been ripped off. Not everyone is out to do that to another member but calling the person out on this is a little childish. You can always ask a moderator to intervene or file a PP complaint if you sent the money as "goods" and not a "gift."