There is approximately 7 months of inventory on the market in New Britain. If you price your house according to what other properties are listed at and recently sold for, you can expect to wait about 7 months. If you price it 2-3% below market value, you can expect a much faster sale.
This is very general - my anaylsis does not take into consideration desireablility of your neighborhood and price range. Some neighborhoods and price ranges move faster than others.
If your property is priced at fair market value, you should expect a sale within a 3-6 month timeframe. (If priced aggressively, 3 months or less.) In the Greater Hartford Area properties in good condition are generally selling the fastest.
Every area is different but I would plan on it taking 6 months because of the inventory that is on the market right now. If it sells in less time then you have done a great job of pricing , staging and maintaining your property. Good luck!