Should I buy a used forklift instead of a new forklift?

A used ex-fleet forklift would make an excellent choice when a company uses a forklift infrequently, or if the forklift is not critical to production. However if a forklift is utilised more than 3 hours per day or is critical to production (i.e. if production stops if the forklift has a breakdown) then our full maintenance rental would be preferable.