I found a guy selling 4 bikes from craigs list. I'm going to be around 58c, so I was hoping some one could tell me if any of these bikes are a wise buy. I was thinking about offering less than the asking price. What would be a good price for these bikes? Anyone's suggestion would be greatly appreciated. TIA

*Link to 4 bikes 4 sale*
http://sacramento.craigslist.org/bik/607010276.html