Would it be worth buying an O of or do you think i should buy properly harvested shit cause it will not be potent.
And from what I've heard amber hairs degrade thc to cbn which represents -90% potency, not to mention cbn gives a worse high so it's more likely to just be like weak weed?
Its impossible to answer this.
I believe not ALL the THC will be degraded in even amber trichromes, just much/most of it.
If you're starting with really strong stuff, even if half or even more of the cannabinoids are degraded, its still going to be "OK". IE, imagine having to smoke a whole joint instead of only a few hits.
On the other hand, if you're starting with weak weed, losing a bunch of potency will be really bad.
And then there is cost. Even if the stuff isn't all that great, it might be worth buying if you can get a great price for it. Weak weed is still fine for cooking with, or even possibly making hash.
So my answer is that you can't establish a dollar value for weed of unknown quality, and its impossible to know whether or not you "should" buy any.
What I would say is that if you want the best possible stuff. . .pass.
If you don't mind stuff that isn't the best, my suggestion is to try before you buy. You should only need a few hits to know how good the stuff is, and what its worth to you.
If its not good, you're not out very much, if at all, and you don't have to buy any more.
You can always offer what you think the stuff is worth after trying it.
If you can't try before buying. . .pass.