Is your listing agent obtaining 'feedback' from prospective buyers? You obviously have more than just tire-kickers touring your home.
If you have your home listed FSBO or with a limited agency, time to roll up your sleeves and illicit an answer to your question from the buyers agent(s).
Are you or your listing agent highlighting financing options to the potential buyers? That can make or break a deal. Buyers have hundreds of options. Terms of the financing can muddy the waters behind the scenes!