Any do's an don'ts and red flags that come with ordering stuff outside the darknet market. This is with a place that simply doesn't use it. It's obviously a pharmacy in a third-world country. Western Union/MoneyGram seem to be the norm for the financial transactions.
Who know's what kind of place this is but if there is anything obvious in the way they communicate or list their items that sets off scam/counterfeit/fake, I would be interested in hearing about it. Thanks.
IMHO you should stick to the reputable markets. Nobody can tell you for sure that it's a scam but some things that could give it away could be very low prices or a generic layout like you see on a lot of the hidden wiki pages.
Stick to the well know markets and vendors that you can research. Escrow is your friend and ordering from an unrepeatable site could involve it's own risks, you never know.