Without my knowledge, my boss has gone and purchased a 2nd hand air compressor which sadly has not come with a written scheme of examination (WSoE). I have advised him that the equipment cannot be used until we have this and have put in place a suitable risk assessment/operating procedure. Everywhere else I have worked have always purchased this type of equipment brand new with the WSoE included in the purchase price and the ongoing examinations carried out by our insurers so I was wondering if anyone could tell me how much I can expect to have to pay to have the WSoE written by a competent person and also what I should be looking for in terms of their competence to do this work and the ongoing regular examinations.