Daniel, the 238k average salke price is probaly for all properties sold, not just 3 BR listings.
Here is a great source for data regarding solds, days on market, list to sell ratio, etc.. It is
This is a statistical analysis done by the board of realtor using actual data, rather than tax records, etc., which a lot of the websites are using. I do think you will find all the data you are inquiring about there.
If you have further questions, please don't hesitate to give me a call or e-mail me. My link to website is listed below......
Thanks, Todd Norsted