Everyone has the right to commit suicide, even if it is a selfish act. I would only consider doing so if I had nothing to lose and no one to leave behind. I would define euthanasia more narrowly. Selling a potentially fatal drug does not mean very much since many drugs are potentially fatal under certain circumstances. Taking someone to a pharmacy to buy such a drug is also not euthanasia. Administering the drug is euthanasia.
Your assertions do not rise to the level of common discourse on FReerepublic, and as such I will not be bothered to refute them, even if doing so is a simple matter of pointing out elementary semantic and logical errors.