I've seen some decent deals on larger vans but often they're conversion or passenger vans with tons of windows. I see this as a liability in several areas -- insulation, stealth, and security. There's a lot of shops out there that will open up a van's panels and install windows, but does anyone actually remove them and seal the panel back up or offer some kind of panel that can be put over them? Is de-windowing actually a thing, or just a really weird custom job that only a few people would do and charge a limb for?