This is Charlie Nedder from Weichert Capital Properties & Estates.
Riverside CT Homes for Sale / Sold and Old Greenwich CT Homes for Sale / Sold can be researched, however I am not aware of a website that provides this information. As a realtor in the area, I would be happy to help you conduct your research, just give me a call or send an email.
Weichert Capital Properties
Coldwell Banker Residential Properties
Don't think what you are seeking exists.....since most real estate organizations have not been computerized for even 10 years it's unlikely this information will turn up on a website.......It may attainable but through considerable time and effort.