This sounds like a scam, joke, or other foolishness.
It's difficult to imagine that any government would pursue a fine that large solely by mail. And it's impossible to imagine a fine that large for a simple drone regulation violation.
Where...
If you're unable to revise the listing, I'd recommend relisting it.
For a $7,000 item, the description comes across as a bit suspicious. Another concern is that your eBay account doesn't have any recent history. When purchasing a high-value...