Is This Retailer Legitimate?

I suspect it's a scam. The site doesn't specify, but the price is too good for even a refurb or good used unit. The same holds true for the other items he has listed.

This is what AI says about the site:

"While there is no specific review for www.jonakhk.shop in the search results, the website exhibits several common red flags associated with potential scam websites:
No specific reviews found: The search results did not yield any specific customer reviews on independent sites like TrustPilot, which is often a red flag for unknown websites.
Domain registration concerns: The website's contact information is hidden (Whois privacy protection), and the domain was registered through a Chinese registrar, which is common with potentially risky sites.
Suspiciously low prices (likely): The search results suggest that extremely high discounts or prices that are "too good to be true" are common indicators of a scam.
Lack of verifiable contact information: Legitimate online stores usually provide clear contact details, including a physical address and phone number. The site's hidden contact information is concerning.
Recommendation:
Based on these red flags, it is highly recommended to avoid purchasing from www.jonakhk.shop to prevent potential financial loss or identity theft.
If you have already made a purchase and suspect you have been scammed, contact your bank or credit card company immediately to report an unauthorized transaction."

I'd pass on this one.

Not the same device but supposedly the same vendor is discussed at https://www.reddit.com/r/Garmininstinct/comments/1pv6473/is_...