Its a sad fact of life that insurance companies consist of, basically, bean counters.
If something is beyond current economic repair (thats rising wages, cost of materials and general costs as well as corporate profits, if translated) then its economicaly untenable and is written off.
If a car worth, say, 2 grand is covered in paint stripper then it requires a complete all panel respray. That will cost a fair proprotion of its resale value at commercial paintshop rates. Insurance companies, as I understand, work on a 50 to 55% valuation factor. If costs exceed 55% of the retail value, its written off.....
If you then purchase the salvage at 30% of bottom book (600 quid in this example, salvage dealer still making almost £300 on the trade for simply selling it on) then spend 4 hundred or so doing the work to repair yourself (as you are a paint sprayer by trade

) you have purchased a car at half price. Unfortunately, its badged as catD and carries a stigma. Same if the locks are punched and it takes £150 or so for a lockset and ECU from a friendly scrappy.....
Some, however, are oblitererated and are ripe for ringing on newer, desireable cars.
Caveat Emptor......
