https://www.polygon.com/2018/12/14/18140968/red-dead-online-store-gold-bars-cost-microtransactions

Rockstar Games released a sizable patch today for Red Dead Redemption 2. With that patch, it has also launched the cash storefront for Red Dead Online. Players can now purchase premium currency, called gold bars, with real money and trade them in for some items in-game.

Gold bars are available in several bundles: