It's Japanese. Everything is expensive in Japan.

One DVD can go for like $50.

Plus, it was really special anyway. It comes with 49 DVDs, each with new, original artwork from Toriyama. Even if the DVDs themselves cost $20 each, 20 X 49 = $980. So I guess $655 really is a steal.

Don't worry about the Dragon Box, you can't get it.