Yes
Most things on the internet that are for sale are not legit if you buy them with a credit card, however: steam, amazon, ebay, etc. are legit. Just be careful with your credit card.
You don't buy houses on facebook.
Yes! Legit!
That's not a legit question, the person that invited you would decide that.
You can buy Facebook credits with cash to help you excel in games and buy certain props.
You can buy Facebook stocks from your financial institution, their symbol is: "FB".
Are they giving you free copies of things you normally have to buy? If so, they are probably not a legit site.
Yes, Guy4Game is Legit! All you need to do it; Buy the thing you want to buy. Then go to the Live Chat box and they will help you out and will make sure you get the stuff you have bought.
You can't. You'll just have to buy it legit.
"At a store" I need a legit answer
Legit. But if you don't trust the site don't buy from them!