I've purchased tianeptine products from a handful of different vendors, and sadly, the market has become rather sketchy. Some very "reputable" companies have developed a reputation for using incredibly shady business practices, including selling tianeptine that is alleged to be "99.9% pure," and then cutting it with a variety of other powders/chemicals. For a drug addict, this will probably go mostly unnoticed, but for any serious researcher, this is of course completely unacceptable.
Anyway, I came across a gentlemen casually advertising his product on Reddit, which unsurprisingly led to much skepticism/derision from other Redditors. But out of curiosity, I checked out his profile, and found a link to myqualitia.com. The website design wasn't great (usually a red flag), but I decided to investigate further and happened to come across this and other review sites where I learned that the company is held in very high regard by its customers.
Anyway, long story short, I decided to place an order on a small amount, and I didn't regret it. One thing I learned about the people running is that they prefer to develop a personal report with their customers. Upon placing an order, I was informed that I would shortly be receiving a text message from them, and, to my amazement, the text message I received wasn't the typical sort of automated message one typically expects to get from companies these days -- it was from an honest-to-God HUMAN BEING, a friendly gent by the name of Nick, who you'll mentioned quite a bit throughout other reviews.
Anyway, the product was high-quality and arrived quickly. I was very impressed, and have since made MyQualitia my go-to vendor for all my tianeptine-related needs.