Funny that Jesus would ask that question.

His disciples, James and John, have just asked Him to grant them whatever they ask.  Jesus responds in verse 36 with, "What do you want Me to do for you now?"  Next, Jesus tells them that they don't understand their own question and that the greatest will be a servant.  The least shall be greatest and vice  versa.

Then they meet the least.

Oh, Bartimaeus is not really the least of all men, but I'll bet he felt that way.  Crying out to be healed or to come in contact with Jesus, the crowd responds with jeering and condemnation.  When Jesus heard his cries and called him to Himself, Bartimaeus looses his courage and the crowd has to tell him to take courage.

Then Jesus says to him, "What do you want Me to do for you?"

In Jesus' eyes, equality is attained.  That Jesus would offer the same assistance to two "full-of-themselves" disciples that He would to a blind man is remarkable.  Jesus loves us all.  And the offer still stands to the worst and the best. 

Salvation is surrounded by grace.