The link below shows Trulia's Real Estate Guide for Andover Massachusetts. You'll not only find sales information but also school and community information as well.
I hope this helps you.
Customer Service Representative
First, are you sure its Andover MA and not Andover MN?
Second, yes I know about Andover MA because I grew up in MA and "Andover is a wonderful place to live but extremely expensive. If you have any questions about it feel free to contact me.