Just a guess but I think this might be my strategy if in your shoes:
1. Advertise locally (Craigslist here, although more and more it sucks). just for a week or two to see if there is local interest. Could also try FB Marketplace. Then,
A. Advertise nationally on Autotrader and similar sites. Expect it to take a while.
Or
B. If eager to sell get it listed on an auction site (even eBay) but be prepared to accept a lower price for a quicker sale

If you’re in BMW CCA advertise there, put an ad up here, other forums, etc. Low results likely but low/no cost

__________________
Mike

2005 e53 X5 4.8is 169k miles
2018 f90 M5
2018 Volvo XC60