This game is available on pre-order due for release on 2 December 2016 from Amazon.
However, if you are a PRIME customer, it seems that you can get a £2 discount on this item at check-out, which brings this to £26, which I believe is a bargain. Even at £28, it is a good price.
Some features are as follows:-
Super Mario Maker for Nintendo 3DS is all about playing courses anytime, anywhere
Compatible with all consoles in the 3DS family
Comes with 100 built-in courses designed by Nintendo
Levels have extra challenges too, such as collecting every coin or defeating every enemy before reaching the goal. Completing these extra challenges earns you medals
Create your own Super Mario courses. It includes every tool and course part from the Wii U version, except for the Mystery Mushroom and the linked Mario costumes