The price of a chocolate fountain depends mostly on what size you go for, how long you hire the fountain for, the quality of the chocolate , and whether the attendant is included in the package. Generally, a fountain that would serve 100 guests will run between £250 and £450, including everything except for the food items to be dipped.
If you plan on inviting more guests than that, you are going to probably need a larger sized fountain, which will set you back about £500 to £800. On the higher end, you should have a high-quality fountain and premium chocolate included. Expect this cost to go up by several hundred if you plan to have multiple fountains with different flavour options.
Most chocolate fountains cost between £250 and £800 depending on the size, quality of produce and the length of time it will be in operation.