Hello there Mercedes. The difference between buying a condo and buying into a co-op is very simple. With a condo, you get a title that you can sell when you want to, as long as you have a buyer. With a co-op you're not buying property. You're buying a membership that allows you to live there for a certain amount of time. The co-ops can be sold to different owner-investors, but you never own them youself. That is the real difference. Is that what you want to do? Look at it carefully. Hope this helps.