instead a range should have been given, and it is the buyers choice for the exact offer price.
did you have an appraisal contingency ?
if so, and the house did appraise for your ultimate purchase price...i doubt you have a case.
All agents are bound by full disclosure and are required by law to fair and equitable treatment of all clients. Did your agent prepare a CMA (comparative market analysis) for you, showing what homes had sold in the neighborhood in the last 6 months? Did you have an appraisal done? Did your agent also represent the seller? Did you check Trulia yourself for comps in the neighborhood? Our society is so quick to sue and so quick to judge others. Even though you rely heavily on your agent buyers should also do their own homework and be prepared to make their own decisions. Not all buyers agents are created equal.