I got 2 of these for $17. They work very well for camp stoves. The piezo lighter on my Coleman propane stove only works half the time. So far this has been flawless. They're far better than butane lighters at high altitudes and in the cold.
For emergency use in the field, though, I want my Zippo in my pocket. Liquid fuel is more reliable than a battery.
These come in a very nice box that probably costs as much as the lighters.