Nintendo Switch 10% off with LETSBUY20 code on Google express after Tax $300.74
Looks like the switch is up to $30 off with code LETSBUY20 on Google Express. The code is 20% off an item with maximum possible being $30 off. The discount is applied after tax.
So $299+$30.75(tax)-30 = $300.74 for me. This code might alsio work for other items.