VERY few agents ever make anywhere near that kind of money. In fact most of them make less than a good full-time job pays. For an agent to make $100,000 they would have to be very hardworking, work alot more hours than a full-time job, and sell alot of luxury cruises.
I would estimate the chances of an agent making that kind of money is maybe about 1 in 100. Problem is when they are that busy, they can't spend the time with each client that needs to be spent, plus they have alot of overhead - probably even have an assistant or two working for them. So while they may make $100,000, their take home pay is probably less than half that amount.