Yeah
@Dol'Gorath, yours is the old black faction guard horse. You use to be able to get them by dismounting faction guards and taming their horses.
They came in 3 styles as far as I know, pure black with a long mane like yours, light black with a short mane and light black with a long mane. In recent years some have tried scamming 16th Anniversary horses as these (whether intentionally or not) but there is some ways to differentiate, i'm pretty sure that the rare ones all appear as a "Tan Horse" in the trade window as opposed to a "Dark Steed". There's also the hue difference as hue 2692 is the closest hued 16th Anniversary horse to the old black faction guard horse which where mostly hue 1109, i'm unsure on the lighter hued ones though.