Set at' is valued at, as 2Ki 12:4 'The money that every man is set at.' 'Set at nought' means treat with contempt, as Lu 23:11 'Herod with his men of war set him at nought.' 'Set by' is to value, esteem, as 1Sa 18:30 'His name was much set by.' 'Set to' means to affix, as Joh 3:33 'He that hath received his testimony hath set to his seal that God is true.'
Then the princes of the Philistines went forth: and it came to pass, as often as they went forth, that David behaved himself more wisely than all the servants of Saul; so that his name was much set by.
And Jehoash said to the priests, All the money of the hallowed things that is brought into the house of Jehovah, in current money, the money of the persons for whom each man is rated, and all the money that it cometh into any man's heart to bring into the house of Jehovah,
And Herod with his soldiers set him at nought, and mocked him, and arraying him in gorgeous apparel sent him back to Pilate.
American Standard Version Public Domain