I personally would just keep it unless 100% sure I was never going to brew again (or need the space).
Otherwise I would just give it to a friend that is interested and you can be an official taste tester of their beer.
I don't mean any offense, but it is priced way too high. The only things that have much of a used resale value are the chiller, maybe the larger pot (depending on size), possibly the burner and stir plate. I think realistically $150 is the top you would get for the lot.
Once people make the...