'Buy' in the Bible

I counsel thee to buy from me gold fired by fire, that thou mayest be rich, and white garments that thou mayest be arrayed, and the shame of thy nakedness may not be manifest, and with eye-salve anoint thine eyes, that thou mayest see.

and that no one may be able to buy, or to sell, except he who is having the mark, or the name of the beast, or the number of his name.

'And the merchants of the earth shall weep and sorrow over her, because their lading no one doth buy any more;