u/chou311

Hi everyone!
We’re traveling to the Amalfi Coast this August. Our flight lands in Naples at around 5:00 PM, and we’re planning to take the train from Naples to Salerno, where we’ll be staying.
I checked the train tickets online, and they’re currently around €6. My question is: do these ticket prices usually increase closer to the travel date, or do they stay the same?
Would you recommend buying the tickets now, or is it just as easy (and the same price) to buy them when we arrive at Naples station?
Thanks in advance for any advice!