I would probably had not paid it. After a few letters the company would probably have dropped it. If they turn it over to a bill collector, so what? Just ignore them, especially if you are moving to somewhere else.
Back in '76 during my first ever trip to FL, three of us drove down, nonstop.
My friend got a speeder as soon as he crossed the GA border, one in Ft Lauderdale, and another in Hollywood Fl.
Three tickets in one week.
We left and drove back to NY. He gets a letter in the mail a month or so later saying he would be subject to arrest if he ever came back to FL.
He now lives in Orlando

I think today might be tougher as the DMV's eat cheese with other states.