You could actually order this from amazon.de up until recently and have it shipped to you. That seems to have disappeared, though.
An NDA requires peer-reviewed studies, and something that looks at least a little like scientific rigour.
Of course we could just not bother with that.
Is that really a smart thing to do?
And these aren't necessarily old pharma hand-me-downs. There are lots of novel and strange drugs (9-MBC, lol) that you can buy for next to nothing.
Still more expensive than the rest of the random Chinese vendors, but the upshot is that participation rates are very good for Nexaph and so there's a lot of testing done -- especially for GLP1s. For example, the current batch of Tirzepatide 60mg will have a 3- or 4-vial COA done by Nexaph themselves, another 3-vial random sample tested by customers (but then compensated by Nexaph), and at least one and maybe two big group tests with 7+ vials doing a full range of mass/purity/endo/sterility testing.
I've not seen too many other vendors that get such a high participation rate. And even for this company, for non-GLP1 peptides it's still tested pretty well but not to the same extent.
Even at their expensive price point, you could buy a few kits (10 vials ea) and pay $1000 for a full suite of tests and still be into it about $80/vial total, where a vial is ~65mg and lasts most people at least a month. Do the math on that -- compared even to cheap compounded tirz it is a fraction of the cost. There is good reason why a lot of people are taking that route now.
And back to your original question - once you are on the Telegram group, ask around and people will invite you to other Telegram and Discord groups for various vendors.
Or go to glp1forum.com and a lot of the same vendors will have posts there with information on contacting them.
Indeed, plenty of peptides that aren't really well tested in humans (in some cases, like at all). And some that have tests in foreign countries but are not recognized by the FDA (like Selank and Semax, which are nootropics). And if you want to get ahead of the curve, you can buy things like retatrutide already even though it hasn't quite completed Phase III tests yet so Lilly isn't able to sell it to you. If you hunt a little, you can even buy orforglipron now.
It is quite fascinating to watch. A lot of people are very willing to experiment on themselves. And it seems like GLP1s end up being a gateway drug -- people go to the gray market to get it cheap, and then they cave to temptation and try some of the other stuff they can get the same way.