Your gpsmap 220 will work with any passive (i.e., unpowered) antenna. If you have the original antenna for this unit, and it's been working all along, I suspect you have a bad connection somewhere. The antenna is passive and not likely to "go bad." The gps itself is rugged. If it powers up and displays charts, just won't pick up the sat's I'd suspect the antenna connection and beg/borrow some one else's antenna to hook it up for testing. I would not throw it away too quickly. On the other hand, the newer units have much faster redraw rates. The 210/215/220/225 series are too slow on the chart redraw for a boat moving over 10 knots (IMHO). It's old technology, so probably time to upgrade. keep the old unit for a backup.
If shopping, check out getfeetwet.com as well. Lots of debundled and reman garmin stuff. the debundled 4208 is $100 less than at BOE for example. No affiliation with either, but have bought a bunch of stuff from getfeetwet.com. Have not dealt with BOE.
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High Tide on Dividing Creek
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Buoy Scout: Tiara 3300 Open, 454 Crusaders
Achy Breaky Boat: Fiberform 16 Runabout, 60hp Merc
Dividing Creek, Virginia
Mid-Bay on the Chesapeake
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