This is great!
Regarding price, only the market tells you what the right price is. If you are in the ball park with your competitors, you have to show why your product is better, and deliver more value to customers.
Other thing to pay attention is CB1 and CB2 are nearly dead, since CubieTech does not seem to stay with a board layout, and CB3 has a different layout and newly availabel A80, is again different.
It would be hard for someone to buy this product, if it is only available for these ancient boards!