1993 mitsubishi fh141g tipper seized motor

nz new truck 2 owners 307797 km has been sitting for several months and when i tried to start it i found it was seized. i took the radiator out and tried to turn over manually but she is seized solid .It was running fine last time i used it so i dont know whats wrong It has not got hot and there is no fluid in cylinders so i am selling as is no warranty obviously. truck has an electric hydraulic hoist which works fine no leaks cof ran out in may, i will bring reg up to date,it has about 1500 kms of ruc. truck had new king pins for last cof other than that it was fine and has only done less than 1000kms since last cof, regularly serviced and not bad cond for age, tare 3850kg gvm 8500 kg ruc weight 09 gcm 12000 certified tie downs on deck. owner retiring and cant be bothered repairing , will be sold to highest bidder and buyer must organize transport ph paul on 021355552