Where can I get loads of the Sims 2 expansion packs cheaply?

I want to get back at EA, because they are f-ing useless. I tried to illegally download, but I won't seem to work. Maybe you could actually help with my problem on EA? I downloaded the Sims 2 - Best of Business Collection from the EA Store and installed on Origin. But the expansions won't light up on the Sims 2 launcher. Any idea what to do? But answer my main question as well!! :)