I've had people make low ball offers on day 1. I turn them down. There is always someone looking for a deal (hey, I am too). So you need to be patient, perhaps repost in a week or two. You will find the right buyer. That guy obviously was not.

I have gotten some really, really low ball offers on occasion. And some of the reasons are really lame. The last one was: "my husband told me I could only spend $100 on a bike". I felt like asking why she was looking at my $200 bike then? Its kind of like, you must be kidding. I just tell them no thanks.

It helps in my case that I am running out of bikes to flip. So there is no rush to sell the few remaining bikes I have left.

95% of the time, if someone comes out to look at the bike, they go home with it.