Citadels + Dark City recent purchase

By nazguz, in Citadels

Hi everyone

I just bought this game.

As it is the new printing it now comes standard with Dark City expansion. The online store had a special with Citadels and Dark City. I did not realise at the time that it now comes in the main game.

Am I best to get rid (on-sell) of the boxed expansion or can I add the city cards in the Citadels deck to have extra purple districts?