It was bought in 2003 for $403,000 so they are pretty close to selling it at a loss. Depending what their mortgage amount was they may be close to becoming short sale, which can be a very frustrating process. It has been on the market for 72 days and dropped in price once. I checked out the sales history for waltham condo's and 6 have sold in the last year with and average sale price of $388,483. The average discount off of original price is 5% and the average days on market is 72. Right now there are 33 townhouses on the market so there is pretty stiff competition which is likely part of the reason it hasn't sold yet. For instance these:
Seems the property is in nice condition - built in 2006 so fully upgraded - plus it has garage parking. Near the train and park.
Generally speaking Waltham is a great place to consider investing as they are seeing an economical boost because a lot of tech businesses are moving their head quarters to the area due to proximity to the city and lower commercial costs, which should help boost the residential market.
Hope that helps. Good luck!