Peugeot mixtes have sold for insane prices in the past. In reality, I think they're worth $50-150 depending o condition and features. If you take it off the hooks and sell it as is without cleaning you'll get $50, if you clean it, put air in the tires and make it presentable you could get $150 on your local Craigslist.

I can get $150 all day long for Peugeot mixtes in Tamapa.