As long as you don't discuss sources. I can kind of tell you are interested in getting some of this stuff. I advise you to put that idea out of your head.
It's super unlikely any vendors sell this. It's an opium-derived semi synthetic drug, you need opiate alkaloids as feedstock to make it. So the only people who have it for sale are going to either be serious research firms (Sigma Aldrich) or people selling fake shit. The amount of effort to synthesize metopon, and the requirement that opium be involved anyway, usually makes heroin the most cost effective drug to sell. (Fentanyls were hot on the "RC" scene because they are relatively easy syntheses compared to the bastard of a synth that morphine alkaloids need).
If the vendor selling purported 14-MeO-Metopon is the one I think it is, they are of incredibly poor reputation, and
cannot even manage to get something as simple as MDAI right. I will bet you my front teeth that whatever they sell isn't metopon.
Not good!
Anyway, because this is a poppy alkaloid derivative, it is
Schedule I in the US and Canada, and probably
Class A in the UK. Opioid analogues are pretty much all illegal. The analogue act will get you bad here.
Assuming what you buy is metopon is not enough, you should get some analyses done by somene with a NMR or GC-MS. Do not rely on color-change reagents. Do not just dive right in and eat it as soon as it arrives. With compounds thispotent you should be 100% sure of what you have before continuing any further. If you buy something that is not 14-methoxymetopon, or it's a complex mix, throw the shit out.
14-methoxy-metopon closely resembles oxymorphone (and hydromorphone) in terms of structure. It's likely the bioavailibility will be really low by every route but IV/IM. You need to seriously be fucking careful with this stuff.
Assuming it's 500x morphine, 20 micrograms (0.02mg) will equal 10mg of morphine in effect. You MUST have a
sub-milligram scale to use it safely. And it needs to be accurate & calibrated. And you need to work with gloves and a dust mask, away from drafts and breezes. I would also keep a buddy who has a shot of Narcan around, just to make sure you can return to the land of the living...
Speaking of shots, the possibility of varying bioavailibility means that unfortunately you will likely have to IM your shots if you want to have any chance of having a reproducible dose. Overdose is not something you want.
The other caveat is since it is so potent, if you buy even 50mg or something like that, it's more than enough to get into a bad habit of using it regularly. But when that shit runs out Immodium is not going to save you. You will be in intense agony during w/d's if you allow your dose to escalate.
The risks of storing and handling metopon, and the fact that anything more than 1mg is enough to develop a serious opioid habit with, make it a bad choice as an opioid drug.