Not really. They cost nearly that much to the military, and that’s before minimal safety equipment was added (back in the ‘90s air bags weren’t mandatory on them): they needed better seats, locking doors, and an ignition key, among other things. Air conditioning was pretty much mandatory because of how intrusive the drivetrain is. They have those gear drives at the wheel hub, and all the waterproofing on the engine. Most also had hard tops, which added to the cost. The civilian version really was the same truck as the military version, with a few extra systems to make it saleable to the public.
Military HMMWVs started at $26,500 for the base, BASE model (cloth doors, roof, no winch, etc.).
The civilian model retailed at around $100k (my USAR Field Artillery commander was the AM General marketing VP).