Because the game is so old, EA has long since shut down the authentication servers for FIFA 2005 . However, the disc-based installation still requires a valid key. An (for the European DVD version) or one that passes the offline algorithm check.
If you are looking for an exclusive product to resell? No. EA will likely never re-release FIFA 2005 due to licensing (the FIFA license has since moved to EA Sports FC).
(like Steam or Epic Games Store) that sells "keys" for FIFA 2005. Risky Sources:
