It has to have a Maryland State Safety inspection done on it, you have to pay tax on the purcahse price or book value (whichever is grater to the mva. The titling fee is $20 i think and yearly registration fees depends on the GVW of the trailer but it is
G Trailer 3,000 lbs. or less
$51.00*
G Trailer 3,001 - 5,000 lbs.
$102.00*
G Trailer 5,001 - 10,000 lbs.
$160.00*
G Trailer 10,001 - 20,000 lbs.
$248.00*