In Billerica, the average list to closing time in the last 3 moths has been 125 days. The longest gap has been in the $400-$499 price range which was 198 days. I hope this is helpful. Good luck!
Also you can get an idea of where the market is heading by looking at the absorption rate.... how many units sold compared to how many are listed, as well as looking at the underagreements.