These tickets have a way of surprising people, as you found out, because you don't even realize that you did anything wrong until you get the letter in the mail. Not only that, but your first one is $375!
You OR your attorney must appear in court. You can choose to fight the ticket, but you're likely to pay an attorney significantly more than if you just have him/her try and negotiate the ticket for you. The fact that you've never had a speeding ticket is certainly in your favor. I've seen several of these where the prosecutor has reduced the fine by a good amount because the client was represented.
There are many traffic attorneys on Avvo that offer free consultations. See if you can find a couple around the Charleston area and give them a call. It never hurts to ask a few questions and get a quote.
I wish you the best in resolving his matter.
This answer is being provided for information purposes only and is not intended to be, nor should it be interpreted as, legal advice. An attorney-client relationship has not been created. Attorney is not obligated to pursure, or responsible for, your claim unless and until a written retainer agreement is signed. There are strict time deadlines on filing claims and, as such, you are advised to consult with and retain an attorney immediately to file such claims timely or you will lose any right to recovery.