Want Adobe Illustrator for a good price.

I want Adobe Illustrator for a good price. I don't want the newest CC version that requires a subscription. Does anyone know of a legit place that sells old software? I would even take used or from someone on here selling. My understanding is that CS6 is the last version that does now require a subscription. Any advice on whether or not that's true and how best to go about getting what I want would be appreciated. Thanks