Fallout 76 -XB1, PS4, PC - Free BETA code!! - $47.99 shipped w/ prime
Prime customers can Pre-order Fallout 76 at Amazon for $47.99 and also receive a code for the BETA for early access.
I pre-ordered mine the other day and got the BETA promo code within a few hours. You will need to log in to your Bethesda account and add the promo code there in order to reserve your spot in the BETA.