It also depends how far into the season it is. Usually at the start 0.01 cubits will go for 2-3mil, then by the end of the season it shoots up to 8-10mil. A couple days ago at the end of s5 I was able to sell 0.01cubits for 15mil.
In general, the price goes up and up the further into the season it is. When the season resets, you can keep cubits, but not the money, so cubits become a lot more valuable.