I have a super clean 1949 Caterpillar D2 4U with hydraulic 3 position blade. It has no blow by and runs and drives perfect. The undercarriage is in really good shape and the whole machine doesn't have one leak. It has 4660 hours. I have not been able to get the pony motor to start lately so I have been pull starting the machine with a forklift. Text me at (406)899-4937 and I can send you video of it running and pushing dirt. $5,500 OBO.