Ditto what Lee said. I have an Arnav unit in my plane. I got it off of eBay for $100, everything included. The last database update is from Dec '99, but the airports haven't moved around much since then. It's very accurate and provides all the functions of a GPS except altitude information. And being panel-mounted means no wires, clamps, holders or glare problems.
Plus, it adds another milestone to long cross-country trips. First, there's flying from one side of a chart to another. Then the trip takes you to a whole new chart. But the big milestone is when (somewhere over Ohio) the Arnav reports that I'm leaving the Northeast Chain and it's syncing up with the Great Lakes Chain.
Makes you feel like you've flown a great distance.
As Lee said, it's not worth removing unless the space is needed for something else. When (if?) I upgrade my plane to IFR I'll need room for two NAV/COMs and an audio panel. Until then I'll keep the Arnav LORAN.
