I suspect this is what happens to bikes when the owners post unrealistic prices on craigslist or at yard sales. They don't get the $300 they wanted for a "minty" "vintage" "classic" bike. So they hang onto it until the very last possible moment and it's moving day or the spousal unit issues an ultimatum about spring cleaning.

It's hard to get $100 for a Trek or other decent brand mountain bike that might have scuffed paint or need tires or a chain, when new looking BSOs are available at the big box store or pawn shop for $50-$75.