I've been a long-time seller for HBO GO Accounts.
1.5 Years on CryptoThrift, 2+ years in general on various forums & messageboards.
Some of my first sold accounts are still valid and have not needed to be replaced by my 1 Year Guarantee.

The following link is to a Full Escrow listing on CryptoThrift -- which protects both buyer and seller.

https://cryptothrift.com/auctions/memberships-invites/hbo-go-account-172955/

Don't miss the various excellent programming HBO has to offer.
These accounts work on all systems and computers. Android, Apple, Windows, etc.,