I do not have one but I have always found AM's pricing of this strange. AM sells just the sound board for their 50' boxcar for $130. They sell the 50' boxcar with the sound board and two speakers installed for $143, so they do all the work and include a $56 boxcar for $13. That assumes the sound board is battery powered. If it is track powered the wired trucks with electrical pickups are $40, $20 more than the standard boxcar trucks.