SNG Trading via Rakuten offers the Nintendo Switch Neon Console bundled with Super Smash Bros Ultimate, Super Mario Odyssey, and Pro Controller for $479.95. Coupon code "SNG80N" cuts it to $399.95. (You must be signed in to your Rakuten account to see this price. Not a member? It's free to join.) With free shipping, that's $80 under the lowest price we could find for these items separately elsewhere. (For further comparison, we saw the console with Super Smash Bros Ultimate for $306 last week.)
It's also available in Gray for the same price via coupon code "SNG80G". (You must be signed in to your account to apply the coupon.) Both deals end December 31.
Note: Neither item will arrive in time for Christmas.
Making even one of these mistakes can easily cost you tens of thousands of dollars.