PA has a one time $20 fee. I always thought they were more too!Send me $80 and another $50 a year every year for 10 years and I'll make you a nice sign for the back of your Insight.
You can have as many letters as you want. I'll even allow profanity.
Never have understood the appeal of vanity plates.
I'd rather take the money and drive the Insight an extra 1000 miles every year with free gas, for the cost of the plates.