I also it matters where the OP lives.
If it is illegal to purchase, then nobody would have it. If it is a restricted purchase, then it would seem you would need a license of some kind to order anyway. If your site is local(ish) and isn’t asking for anything other than payment, I don’t see how buying it could be illegal.
it is legal to buy if you own cattle or directly work with cattle that are headed to slaughter.
thats its intended use to be used for feed lot cattle to maintain there size during shipment to slaughter.
now as such its not regluated by the DEA Regulations governing the use of implants are set by the U.S. Food and Drug Administration (FDA).
now they do have a name of who bought it and where
if you use a card like I do you better either have or work with cattle if they come asking you where you implanted the implants you cant readly point to your own ass now can you.
its a tricky situation its not a safe alternative to human grade gear.
you can get in trouble not for having it but if you have any supplies tha tshow your intent to convert it for human use then it is no different than having a vial of pharm grade.
also the conversion itself can be botched many ways and cause more harm than good
use this only at your own educated risk
I dont recommend it