Ended up flicking off the domain name anhedonia.org. Admittedly I forgot I even had that domain name and the unsolicited offers sent to me were ending up in the Junk folder unbeknownst to me until I went to check that folder.
No, this is not an invitation to begin sending me unsolicited offers to buy any of the other domain names I happen to hold.
Looks like Domain Agents and Escrow.com are legitimate in so much so the proceeds from the domain sale has appeared in my bank account. That said, the mechanics of the domain sale process however I feel could have been made a lot more clearer upfront and feel I was left hanging by Escrow especially particularly on up and coming steps I should be taking in advance to ensure a smooth transaction.