Huh? I don't see anything wrong with his question.

At about $30 each yeah it can get expensive. I have all four. Your best bet is to look at what planes are on each add-on and decide if they are ones you really want. I don't like the fact that they keep putting some of the same planes on the new add-ons. As far as the new airports go well thats a matter of taste. You can design your own or download tons of others if you really want them. I personally don't care about the different airports. If you're buying purely for entertainment then get them all. If you want it for flying experience then buy only the ones with planes that you may someday actually fly.