When will we finally get better prices? Currently SSDs are 16 to 20 times more expensive in Europe.

That's absurd. And their capacity is still around 120-240 GB, which is nothing (and don't say SSDs aren't for storage, because a game runs 20gb+ these days)! I had that much capacity 10 years ago already.
For SSDs to be even considered to be becoming mainstream, they would at maximum have to be only twice as expensive, and offering identical, or very similar capacity.