Alternatively to keep it proactive you could list the vendors in price order from the cheapest to the most expensive, that way it's not a vendor bashing exercise, it's a helpful list of options to help buyers make informed choices. That would hopefully promote some competition and highlight the disparity in what some are charging. I'm still of the view if you don't like it don't but it but there are only a few reliable vendors not rorting and inflated prices will if not questioned become the established norm. No one can in all consciousness justify some of those prices you listed earlier, no fucking way.