For what my 2 cent is worth.
The scratches - I would bet a pint its come off a car roof at some stage. All the rest, looks like the owner swam a fair few times.
The dent on the tail - insignificant unless you smash the same point again.
The dent on the bottom - will make the boat much slower
The damage around the ratchet - the will pull out again and again.
The outline of the hull support is coming through the hull - a crack waiting to happen.
Overall, its flower pot material. Its a classic example of how swimming with no airbags kills boats. It will be very very slow, hopeless for surf. If you paddle flat water and sluice only, its worth 200. Otherwise steer clear