For all Recovery services, they require the game to already be bought and activated, and the seller would need to login to the account (either Steam or Social-club) in order to process the service.
Although, some sellers offer a Money drop option, which would purely be based in-game, no account info should need to be traded between any parties besides your social-club username for an invite to a private lobby. (How I do things). Pre-modded accounts that some people sell should also include game access, otherwise it'd be pointless. This goes for cracked accounts as well (alts).
Hope this helped.