I sold locally via Facebook Marketplace / OfferUp and while you get lots of low-balls and troll messages, the legit buyers are actually fairly pleasant to deal with. Met the buyers are my bank nearby and took the cash to deposit into my bank account with a teller while they held onto the PS5 in a bag.
I ended up getting 4 total (3 disc, 1 digital) which only 2 of which were console only (disc through camping at Fred Meyer; digital in the recent Amazon drop).
Sold a 2 discs for $850 and $750 and 1 digital for $650. Proceeds paid for the $855 ultimate bundle I got from GameStop where I kept most everything, with an additional $20 on top.
Nothing crazy like the initial market when it was $1000+.
I was able to return all unwanted items from bundles to GameStop.