The manufacturer's website Garmin.
Garmin make several ranges of GPS receiver.
The eTrex range is arguably the most popular. A comparison chart of the models can be found Johnny Appleseed's Comparison Chart.
Garmin symbols can be changed for many models. Instructions can be found here - Geocaching Symbols on a Garmin GPSr
While the following models may be discontinued, it is still quite possible to use them for today's geocaching.
(add more if you want)
There are many free maps available for Garmin GPSrs through Open Mapping Projects
Loading Caches onto a Garmin
- Obtain a GPX file (or a GGZ file for newer Garmin units) containing the caches you would like loaded onto your unit.
- From Geocaching Australia, create and run a query – selecting GPX (or GGZ)
- From Geocaching.com, create a pocket query and schedule it. Eventually it will be generated and available for download.
- If you use computer based Waypoint management software (like GSAK or iCaching), you can export GPX files from these programs too.
- Plug your device into your computer with a USB cable. It will mount like a USB drive.
- Browse into the newly mounted drive. You’ll see a few files and folders – find the GPX folder and enter it.
- Copy any of your GPX files into this folder.
- Eject your GPSr and remove the cable. The unit may turn off when this happens. Once you restart the device, you should have a list of geocaches ready to go and find.