It can vary a lot. It should include your shore power cord and propane tanks. It will probably include your sewer hose but they are normally very cheap and too short. You will probably want to buy some treatment chemicals for your black holding tank. Wheel chocks of some type are also needed. A white RV water hose and a pressure regulator are also on the list of things to buy. Do some research on this forum on voltage and surge protection. Lots of opinions but I wouldn't be without one after having had electrical damage. Typically dealers offer a discount at time of purchase on accessories but check out prices at CW, Amazon, and Walmart to know in advance if it's truly a good price.