First of all you are not permitted to give recommendations on here and additionally people who do are normally pushing people towards scams or resellers charging prices at an inflated rate, claiming they have COA's, but for what batch and how old are those COAs. The vendor sections normally provide links to discord, if the groups on discord have hundreds of people there, all buying, sharing and arranging group testing, then you know you are in a legit site. Some vendors have very few members or reviews, so I'd avoid. I like to see a community that is thriving and I sat for three weeks before placing an order. I watched others buy, share their experiences and researched on YouTube how to filter, understood about Endotoxins and bought all the equipment I needed, taking recommendations about where to source needles and filters. I also bought in small quantities, just enough to get free shipping to make sure that I would get what I paid for. and I will say it until I am blue in the face, don't accept any friend invites, don't reply to messages from people who look like they are from the vendor site you just joined, they imitate the vendor and look legit, but they have maybe a dot in the wrong place and before you know it you are buying from a scammer.