Hey there!
You might see if your LBS would sell it on consignment. With the pandemic hitting the bike industry and bikes being rare to get ahold of, they might be able to best find your buyer and recommend your bike and just take a fee off the final selling price. A lot of people looking on Craigslist might not know the difference between your super nice mtn bike and a ShopKo special (most bikes on my local Craigslist are in that Low $100 - $300 dollar range).
I took the plunge recently myself and plan on selling my current bike when my Riv comes home. I'll first talk to the LBS where I buy a lot of my odds and ends to see if they would sell it for me at an agreed up percentage fee. If they're not interested, I might post on my facebook to my friends and see if anyone's interested in it. If not, it's going to facebook marketplace or craigslist (or I'll keep it).
Good luck!
-Ben