Pricing for CX 500 ? Probably partly depends on your location. and demand.Also the time of year! Here in the Seattle area, I´ve seen a couple advertised for $500-$600.One was a 1978 like mine and appeared to be in pretty good shape.I can´t recall the mileage and don´t know how much the final sales price was.Last summer,I saw a 1978 in nice condition being sold on Ebay by someone in Oregon with a reserve of $1800 !~I doubt they got it.I guess checking your local craigslist as well as ebay postings,Walnecks Classic Bikes, etc. is a good way to get a feel for the market. Good luck on your sales efforts.