Looks like it, i'm suprized it doesnt have the "Hennessey" or "venom power" on the valve covers. It may just be the pics, but that car looks a little beat up.
It is not a Venom 550. The guy is also a dealer and had that car for sale on AutoTrader. It is not a Venom, it only has Venom badges (tags) on the sides.
Before you bid, be careful. It has no badge numbers or Venom badge by the gear/shifter...