I recently purchased this coin for 8 dollars and it has a little bit of rainbow toning i want to now how much its worth? its about ms62 to pr70. sorry for blurry photos

Well, now that your hands have been all over it, you can rule out MS70. Please put that coin into something. You are doing far more damage than you realize handling it.

May have cost $8, but don't fret. You spent $7.50 for a ton of necessary information here. Impulse buys will almost always cost you money unless you don't care about the cost or already roughly know the value. Learn to properly handle coins. Hopefully you learn this now and not when holding an $80 or $800 coin. Proofs come in some form of holder and once out they are impaired and gain a chance the value goes down based on handling. That actually looks like a business strike to me, but I don't know much about Kennedys and not sure if they make S business strikes.

The San Francisco Mint only made proof Kennedys. The proofs come in clad and silver for 2002. If he bought a silver half, then melt for that coin is $6.35. If it is clad then it is only worth $.50 now. @Thomas c show us the edge so we can determine if it is silver or not.

There were 2 proofs. 2003-S clad and 2003-S silver. If they were still in the packaging, around $7 and $14. Since it is out of the packaging, you have to determine if it has been circulated. If it has been circulated it is now an impaired proof, and worth between face value .50 cents and a dollar to a collector. If it is silver it will always have at least melt value, but I doubt it is silver you can tell if the edge is copper or white, $6+.