Strictly speaking, the minimum purchase is just one of the games on Stadia if you are going to be using Chrome on your PC and already own any HID-compatible controller.
The $10/mo gets you 4K streams (you get 1080p without a subscription), and occasional free and discounted games (like PS+ does). At launch, the free title will be Destiny 2 + all expansions (including the one releasing later this year).
The $129 gets you a Chromecast Ultra ($60), and the controller ($70), and 3 months of the subscription ($30) for you and a friend. Both the Chromecast and the controller are usable outside of Stadia.
The $10/mo gets you 4K streams (you get 1080p without a subscription), and occasional free and discounted games (like PS+ does). At launch, the free title will be Destiny 2 + all expansions (including the one releasing later this year).
The $129 gets you a Chromecast Ultra ($60), and the controller ($70), and 3 months of the subscription ($30) for you and a friend. Both the Chromecast and the controller are usable outside of Stadia.