I would ask for as much history on the bird as possible.temperement,vet checks,was he hand reared,what is his diet,any hatch or sexing certificates,has he had any blood work done,why are they parting company with him,where was he purchased,how many homes has he had,will he step up,what sort of routine is he used to. The list could go on.Just go with your instincts. If something does not feel right ask about it.