This is a challenging situation;since each approach has both advantages and disadvantages. You might be able to get a discount on a bulk order of the same chair model, but then again, office chairs aren’t “one-size-fits-all” products. Some employees may have special needs that a standard office chair does not address, such as increased lumbar support or weight capacity.One possible solution: you could order a complete set of highly-rated office chairs at a bulk discount but then swap them out for alternatives upon request.