Just to be certain, is this a brass coin or a silver coin with gold highlights? The latter will fetch more but still not what you're looking for.
Current selling price of one of these coins is about $11,000 or less.
I received an offer above that price to my 1BTC Brass Coin 2012 ungraded. And we are near to close the deal, we are just waiting for the lift of travel ban so that we can proceed to the meet up. I believe the premium value of casascius here in the forum is very cheap so I realize to try sell it outside the forum. I'm very lucky to find one.
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To OP. Try to sell it on social media marketplace like Facebook Market Place and other Buy & SELL platform in your country. You might find a buyer with a good offer. Just required meet up in secured place for the trade venue.
Honestly speaking you can't sell here a cas coin with your preferred price even 11,000$ is nearly impossible for a brass coin unless you have a shining shimmering flawless brass coin.