495 is definitely too high. Keep in mind that most who cycle are cheap by nature and this guy is obviously still thinking about the $$ he feels he sunk into it at the time.
Mirage is pretty low end Campy. 8spd - while fine - has been pretty well eclipsed. Who cares about a wireless computer. If he thinks it has value tell him to keep it. Time equipe pedals were really nice in their day. I would not place them on my top 5 list today.
$200 could be viewed as an insult, but it is probably an accurately valued offer. $275 wouldn't be out of the question.