I used to fence, mostly foil although I was starting to fence epee a bit when I stopped going. It is great fun, and a very good workout. The cost is variable, depending on your situation. I fenced on my university's team. Most uni teams don't have formal tryouts or anything, and they're happy to take new people on and provide formal training. Because I was on the team, I was able to use the team's equipment - mask, jacket, foils. I had to provide knickers and a glove, which set me back around $80 U.S. If you have to outfit yourself, it can be quite expensive. You'll eventually wind up wanting your own gear, but it's a good idea to try it for a while on rented/borrowed gear if you can. Also keep in mind that if you are joining a private fencing team, dues can be quite expensive. I stopped going because I graduated, and the private teams I was looking into were asking as much as $100 US a month.