I believe Sermorelin is the only one that you can get on the legit market with a script, I may be mistaken on that. But otherwise, any of it is risky. Ive bought a number of peptides and RCs from a handful of retailers. Some I had lackluster experiences with, enough that for ED medications I went to getting those from overseas and I have a better experience with those medicatiosn than the peptides. Did the peptides work, yes, but they seemed weak, too me. Enough that I stopped buying them.
As far as GHRP2/6...I had bad sides with those, assuming I had the dosing correctly and timing, didn't do anything for me, enough reports that they take more time (months) to manifest positives was another factor in my trial of those two specific ones.
It's another one of those oh so common things on this board...they're individual, some people like MolonLabeDoc love them and others only thing they got was a lighter wallet and some sides.