Not knowing which house is yours, it would be difficult to give a difinitive answer. In this market giving any type of difinitive answer is difficult but some things that I have noticed over the past few months is this. There definately are buyers out there. There are a lot of homes to choose from and yours has to stand out from the rest, whether it is from asthetics or price. The buyers are looking online first and if your house does not entice them to leave their couch and come look, they may never see it. Talk to your real estate professional, talk about staging and pictures that will show its greatest assets. It needs to look warm and welcoming. Staging is not about clearing everything out and making it look bland, it is about making it welcoming and warm.
Again, I know nothing of your home but I have also been finding that 2 bedrooms on the main floor or no bedrooms on the main floor is difficult. The price range you are in would be for new families possibly and they may not want to put a young child in the basement by themselves.
I did do a quick scan of homes in your zip code between $100,000 and $150,000. There are 14 of them. Two are still under construction and 1 is new. It is hard to compete with those so yours again has to stand out. Take a look at your yard. You may have something there that new builds don't. Make sure it is green and well kept.
You refer to your home as a starter home. Why is that? Is it small or is the price making it a starter home. In my market, $137,000 is not a starter. How are you priced compared to others your size? Check your competition, how are they priced? Your competition is not a house the same age or even sometimes the same size, price range may be your competition.
Maybe I have given you more answer than you wanted but ask these things of your agent and then be willing to make your home enticing. Good luck to you.