Homebuyers are rejecting more offers than ever for 'tiny' issues. What's a seller to do?

Real estate agent Shay Stein remembers not too long ago when buyers pledged to name their firstborn after homeowners to get to the closing table.

Now, buyers are increasingly asking for closing costs, repairs or, in some cases, insist on the availability of street parking or they'll walk, Stein and other agents say.