Is the asking price $500?
If it is, tubing and components will determine if it's a deal or not.
Right off the bat, I spot mtn bike pedals/stem, honking big rear cluster, and what appears to be an SR seatpost. Might just be the light, but is the front wheel black anodized? Also check if there are mounts for a 2nd bottle - up to you if this matters.
As it stands (assuming no majors) and unknown tubing, probably a $300 to $400 bike.