Key will not turn when inserted into the ignition.

What is your question?

Im having problems with the key. I think i need to purchase a new Key cylinder but i wanna make sure. The key will not turn to the acc. position i have tried moving steering wheel, putting vechile on neutral but the key hessitates. After soo many tries it eventually turns. Should i try spraying WD40? or replace the key cylinder. How much does a key cylinder cost and where can i get one.