Please understand that we experts here are independent people and are not tied to any particular brand of device. I personally like Garmin devices, but have used other name brands too.
It was your question of "How can I get my eXplorist 300 repaired?" that drove my recommendations and research.
Finding that the device is about 15 years old, and knowing the cost of diagnosing and repair at a typical independent electronics & GPS shop (~$100 plus), it would be more cost effective to replace the device - with either 1) a "used" but working device of the same type OR 2) a newer model of the same brand and with similar features, depending on your preferences. That is what the links above lead to (used and new eXplorist devices).
TIP: You can also use online stores (like Amazon) to search for other brands (or no brand) of GPS devices. For example, I just did a search on Amazon for "hiking GPS", and have a link to the results below.
You could do a similar search for "hunting GPS" or "boating GPS", depending on how you most want to use the device - to refine the results.
I highly encourage you to research and buy whatever brand of device you believe best suits your needs.
NOTE: It is the knowledge, experience, troubleshooting skills, and recommendations that any deposit here is for. And we experts here are not paid unless you rate the advice we give at a higher level (good or above).
If this has answered your question(s), please take a moment to rate MY service level (Excellent is my goal) so that I get credit for helping you with this question.
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And if you have more questions, please feel free to ask. I'm here almost every day to help.
Thanks, ***** *****