To give you an idea of the current market, in 2010, 33 Tappan homes were sold at an average selling price of $240 per square foot. Seven of those homes were high ranches. Three of the high ranches were similar in size to your home. Those three sold for an average of $237 per square foot. These homes all had 2 1/2 bathrooms. The location, age and condition of your home as well as the size and any updates all go into the likely sales price.
There are currently 5 other high ranches on the market in Tappan priced at $329K-$559.9K, so it sounds like your price is within a reasonable range.
If you would like, I could do a CMA on your home to determine the individualized market value based on location, size, updates, in relation to the other homes that are on the market and that have recently sold.
Licensed Real Estate Broker
Prudential Joyce Realty