I have sold a few things cheap like that too. Here is the way you should look at it, you got the bike for free and made 180 without doing much work. I would call that a successful flip. If you are worried about maximum profit, parting the bike out would have probably yielded the most money, I like to overhaul the bikes and sell them ride ready. You probably made someones day and you made 180.00 in the process.