norlett rotovators.....

testing the water for my papa he has 2 norlett rotovators a 3hp one that is seized and a 5hp one that works perfect...both briggs + stratton engines. he has 2 drive wheels, 8 rotovator blades, plough, stitcher guide blade + back wheels. how much would this make as a job lot £££?

am not selling it on here, im just wondering what its worth so i can put it up for sale.