Business law

Berry is in searching for a car on budget of Rm5000 and approaching Ken who wanted to sell his old Toyota for Rm7000. Berry wants the car from Ken in accordance with his budget. Ken then sell the car to other person since Berry shows his disinterest to his offer. Later, Berry change his mind since Ken's old Toyota is the limited edition type.

1- Can Berry sue Ken for breach of contract?

2- Discuss the above matter with regards to validity of acceptance?

Give the answer with explaination and Calculation