OTOH, people are entitled to whatever folks will pay. I called at about 8 pm last evening, and he didn't tell me that the price had increased. Clearly the bike was worth more than $70 -- I wouldn't have been willing to pay much more than that, simply because I have enough bike projects to last until the middle of the next decade -- but for someone dying to have a decent, vintage Peugeot with components that aren't shabby, it's probably worth $200 to $300 in an urban/university-town market.
I don't like the CraigsList dance either, and have been on the losing end a few times (seller makes an appt., then sells to someone else who shows up first). But I've also gotten some nice loot for (I believe) less than the going rate; so I'm not going to get righteous about CL transaction "ethics."