$89.99 less extra 10% using "BF10" coupon = $80.99
I recommend this product (I actually just used this deal to buy a second set of this to combine with my existing sets)
This 145-piece color-coded building set includes a spinning Ferris wheel, a swirling cone that plays a musical light show, thrilling ramps, fast tracks, extreme launchers and bases that all easily connect together. The easy-to-follow leveled guide includes three different builds from beginner to advanced, or create your own courses.
Usually you can only grab it intermittently on discount between $90-100, so $81 delivered with market club is pretty good.
I have the ultimate set and the starter set. V-tech makes one of the best marble run sets as it's very stable and doesn't fall over. The Duplo compatible "big blocks" pieces on AliExpress / Amazon is probably pretty good too, but I haven't tried that one myself example
Marble Rush Adventure Set - $83.99 @ Toyco
https://www.toyco.co.nz/vtech-marble-rush-adventure-set-3417…
(Pretty sure this is exactly the same as the ultimate set, which is cheaper above)
Marble Rush Launch Pad Set - $48.99 @ Toyco
https://www.toyco.co.nz/vtech-marble-rush-launch-pad-3417765…
Toyco charges $7 shipping or $3 click and collect (Auckland only)
Marble Rush Launch Pad Set - $51 ($5 shipping) @ Grab One
https://new.grabone.co.nz/baby-kids-toys/building-blocks-leg…
Other sets raceway and cockscrew I think aren't available in NZ