Google Express (via Electronic Express) has the Samsung 860 EVO 500GB SSD for $71.99 after the promo code FALLSAVINGS (20% off promo code, up to $20 off).
This promo is valid for your first order.
You have to select the version sold by Electronic Express (which is selected by default), and they are an authorized Samsung seller so you can register the warranty without any issues.
https://express.google.