Same thing happened to my son's old Corsa. Stupid tart over the road reversed into it and stoved all the door in. Because the damage also went into the rear quarter as well (only a bit), the cost of the repair outweighed the car's value so it was written off.
They offered us 1250 for it. I refused that and supplied them with a list of cars for sale of the same age and condition, all for much more than they were offering.
We eventually settled on 1650.
They offered it back to us at salvage (£121), so we bought it back, fitted a 2nd hand door, and it's still going now 2 years later being used by my youngest.