Great question. Conventional wisdom is that the best places to invest in your home are the kitchen and bathrooms. To get a better idea of what you would be facing, competition-wise, I suggest viewing the model homes in the new build homes. Follow that up with an estimate from a licensed contractor. Once you have the total investment necessary to bring your bathrooms up to date, talk with your REALTOR about the likelihood of getting a dollar for dollar return on your investment. Another suggestion-ask your REALTOR if your market has a buying season. If Delaware is like Arizona, you want to have the update completed before the spring buying season.
Keep in mind that I am a REALTOR working in Arizona, so a local REALTOR is going to give you an answer that is best suited to your local market.
One of the difficult things for most people to do is to determine the difference between an update and an upgrade. It is incredibly easy for our tastes to remain locked in time, so our choices of finishes can turn out to be as dated as the items that they're replacing.
Many home-improvement stores will lend you a designer for a trifling sum, who can help you choose something that will be eye-popping to prospective buyers and fit into both your budget and existing fixtures.
There are other simple things to do with your home to look more desirable. For example, painting interior and possibly exterior, new carpeting or flooring if it is worn, manicuring your landscape and putting in new flower beds.