not market price...a certain percentage tho yes.
think of "financial writeoff" as the degree of repair that isnt financially viable to the insurance company.

For example a dc5 stolen or recovered with 2 front seats missing (recaros) is regarded a writeoff. They are worth , to the insurer to purchase probably alittile under half the cars overall value

anyway back on topic , the car is not road worthy so you will have to take as many pictures of it to show repairers and get a fair estimation of repair bill.