No. Having domains parked at sedo is pointless unless you have one word .com-domains. Even then no point. Then you could park them at google instead but some people had fears that the google parking service may not be good.
Making an own little info page with related content with adsense would earn a lot more.
You have to do at least short info pages with good content, good natural keywords, seo-ized and perhaps with css so that the content comes first and the other <body> code after.