If that was your workflow (e.g. build it intact, then modify that to make it looked wrecked) you could sell both intact and wrecked versions... possibly charging a little bit more for the one pack?

Or sell each separately, for the same total... or even a little more possibly?

I suspect having both intact and wrecked versions would provide more value for a lot of folk making renders... especially those rendering narratives, e.g. comics etc.

Also not sure it would be of less value if it was wrecked. It wouldn't be if a wrecked vehicle was what the marketplace buyer had a demand for.

e.g. Stonemason has a wrecked car...

http://www.daz3d.com/shop/city-ruins-vehicles

The unwrecked version is included as a bonus...