Amazon is selling the grey and red/blue v2 Nintendo Switch with an Amazon $25 promo credit.
Add item to cart, then select "view details" on the promotional credit description and click Redeem, then check out.
Also both the grey and red/blue variants work with the promo credit offer:
Nintendo Switch with Neon Blue and Neon Red Joy?Con – HAC-001(-01) https://www.amazon.com/dp/B07VGRJ…3DbA9
Nintendo Switch with Gray Joy?Con – HAC-001(-01) https://www.amazon.com/dp/B07VJRZ…3Db46
Limit one per customer.