Suppliers of new machines must provide proof that all reasonably practical hazards have been identified, alterations or modifications are clearly stated and adequate information is provided regarding the safe use of the machine.
When selling second-hand plant, you must also give written notice to the purchaser, that outlines:
The condition of the plant,
including identified faults
If appropriate, that the plant should not
be used until the faults are rectified
Second-hand plant is more likely to have out-dated or missing safety features. In these circumstances suppliers of second-hand plant must do what is reasonably practicable to supply equipment safe for use at work.