Never give up! Do you have pictures of the bike? Put them up in every bike shop! Offer a reward; and if someone steps forward to claim it, check their story very carefully and be prepared to call the cops if they are at all fishy. And did you have any identifying numbers or marks on the bike? (I always write my name, phone number & eddress with a permanent marker on my bottom bracket spindles, under my seats, and on my seat posts.) Keep watching Craigslist! Never give up!