Is it worth it? How much is the 4 wheeler worth, and how damaged is the bike? You will need to search for the parts. This forum, cl, eb would be a good start. Look for the parts you need before you buy it. That way you will know if you can find them and how much you will spend. I had one that ended up with bent forks, eventuall discovering that the steering neck in the frame was destroyed in the impact (wasnt even that hard.) It broke out inside where it held the lower bearing race, so check it out thoroughly. It even looked fine from the outside.
The erion is only different in paint scheme, exhaust can, and painted black frame. Everything else is the same as other 929s.

 

idk I personally prob wouldnt get a bike that was crashed into a ditch...
Esp cuz you allready have a quad... quads are fun!

And yea the only difference is graphic kit and black powder coated frame/swing arm... exhaust from stock would be the same as any other stock 929

 

I wouldn't buy it. There is no telling what is wrong with it. I don't buy anything that I can't ride. You could get it, fix it, ride it, and then find out something else is wrong with it. Just b/c the title is clean doesn't mean anything. Guy could have wrecked it, thrown it in his pick up, taken it home and put it on EBay. Unless he just gives it to you for like $100, then I would get it, and part it out. Besides do you know if it runs?