You silly negotiators! I handle such situations with a hearty, "Hey, lowball, get the F off my phone and don't call again!" Life's too short and, through sheer good fortune, I've never HAD to sell anything in my life! Obviously, YMMV.
I sell a bunch of stuff on CL. I only deal on the phone, no text, no e-mail, if you can't pick up the phone and call me you don't need what I am selling. I love the ones that want to negotiate over the phone, sometimes I do raise the price, sometimes, I just keep loosing the connection.
Seems like no matter what I put on CL I get trade offers... Will you take a dumpster as partial trade? Hey - I've got an old skateboard that I can trade straight up. I don't have much luck on CL or ebay anymore
To which the rejoinder would be.... "do you have a wife or girlfriend"? LB: ....."yes" Seller: "Would you trade her for this highly desirable sale item?" LB:.......If answer is "No" Then, Seller "Then you'll be paying in cash then"..... LB........If answer is "Yes" Then, Seller..."No one ever trades a good un' (wife or girlfriend), so I'll be holding onto what I'm selling until someone can pay cash for the full amount."