Walmart via Google Express offers the Google Home Mini in Chalk or Charcoal for $29. Plus, link your Walmart account to Google and you'll receive a $25 Walmart Credit for a future order via Google Express. With free shipping (and assuming you use the credit), that's $25 less than our mention two days ago and the best deal we could find now by $15. The coupon will be automatically issued when your Walmart account is linked to your Google account. Limit two coupons per household. Coupon expires January 31, 2018.