^
You should go easy, my man. You might be pleasantly surprised by the quality...
I've never come across dope that I would ever describe as smelling like vinegar. It's just not how I would describe the smell at least, but, at any rate, I've picked up all kinds of dope from the very fluffy white dope that seems to stand up on itself to the more granular, grittier, darker dtan/brownish dope and of course everything in between. I've come across dope with a very earthy, mineral-y smell to it, and I've come across dope with a horrible smokey, ashy smell to it.
In my experience, there's really no way to know for sure just how good the dope you've got really is, certainly not by smell, at least. I mean, you have to remember that these bags travel some distance and despite its being sealed up in wax bags, the dope will pick up on a few different things. The smokey, ashy smell, for example... I feel pretty positive that the bags were in some smoke-filled room. Know what I mean?