With that said, if I were you, I would only sell if I had to, had enough equity to not feel the loss or if I were looking to upgrade (where you could potentially pick up a higher value home for less and be in a better financial position in the next round of price increases).
The market for higher priced homes is always a little slower than more moderately priced ones. How much you ultimately can get for yours depends on a lot of factors. Your price vs.Current competition, exposure to the correct target market, recent sales, the neighborhood, condition, and your motivation for selling, just to name a few.
In Rocky Hill, there are currently 7 homes listed over $500k. There are 3 under contract in that same price range. In the last 6 months, only 2 have closed (average sale price per sq/ft was $194). 1 Year ago the same 6 month period saw 5 closings (average sale price per sq/ft was $201). What all this tells us is that the market has been slow in that price range, but is picking up momentum. If you would like a detailed analysis of your home, please feel free to contact me. I would prefer to discuss numbers specific to your home rather than just generalities. At that point, you can make an educated decision on whether or not this is the right time for you to sell.