I have 4 of these in original boxes. I saw one go off on ebay for over a hundred dollars. mine have never been played with they are still unassembled and very old. Any one have any info- One is a shell truck, ones a mercedes truck-trailorone is a chemicals tank hauler and the lst is a tarpulan hauler truck. I know what i have is very rare. the are no 51,53,80,52