It's unibody.
I suggest paying a body shop to check the vehicle over. It's worth spending a C-note to verify. They should be able to get it up on the rack and to measure to see if it's straight. Body shops can do a lot to fix a car, depending on how good the techs are and how much money is willing to be spent on it. Sometimes the work is really shoddy though, as was the case on a crashed Stratus that I bought and parted out. It had been crashed previously and they just cut off the damage and welded some fresh metal on, but didn't even complete the welds- it looked like they tacked it to align it and never got back to finishing the welds!
I suggest paying a body shop to check the vehicle over. It's worth spending a C-note to verify. They should be able to get it up on the rack and to measure to see if it's straight. Body shops can do a lot to fix a car, depending on how good the techs are and how much money is willing to be spent on it. Sometimes the work is really shoddy though, as was the case on a crashed Stratus that I bought and parted out. It had been crashed previously and they just cut off the damage and welded some fresh metal on, but didn't even complete the welds- it looked like they tacked it to align it and never got back to finishing the welds!