I'm considering buying D&D 5th ed on Roll20, but am wondering whether I should just buy the core rule books separately, or the DM bundle which includes something called "Essentials kit"? <a href="https://marketplace.roll20.net/browse/bundle/4386/essentials-kit-deluxe-edition" rel="nofollow">https://marketplace.roll20.net/browse/bundle/4386/essentials-kit-deluxe-edition</a> Is this really essential, or should I just save me those about $ 10 and just buy PHB, DMG and MM as stand-alone compendiums instead?