even Lego Mario Karts will struggle to top what has been Mario's best Lego set so far - the Super Mario 64 Question Block. A set that was hit with Lego's "retiring soon" label over the summer ...

Lego's Super Mario 64 Question Block set has been retired, but there's still stock left on Amazon. Once the set has sold out on Amazon, there's a very real chance it won't ever be available again.