Thats a good price for those.
Brake pads aren't that hard to change although I wouldn't recommend it if you consider yourself a novice. Its kinda important to do them right!
It's not difficult - the biggest issues are fiddling with the parking brake on the rear set and making sure you take care of the fluid reseviour. Also you are supposed to use a specialised tool to wind in the back brake pistons, but I just used a G-clamp...
But you need to be careful - they're not the sort of things you want issues with later!