You can sue from your home state, he will have to travel to you.
Never pay with a money order.
I have to agree with Perry, why didn't you give the other guy one system and keep yourself out of court, if localboy finds this out it will help his case.
If you are going to sue him, you need his full name, address, phone number, dba, business address if different than his home address, and some that I do not remember. go online and check the laws and statutes in your state for small claims.
Better than suing in your town, call judge judy and see if they will take the case.