In the UK, the idea of any of the public services using second hand or outdated radios would be unthinkable. We've sadly inherited the worst of the US look for the scapegoat afterwards mentality. We now tend to have 'guidelines' instead of rules, yet not following guidelines used in court in negligence claims.
Are we not really discussing what is the best, worst case scenario. As in, there is no budget for the proper radios, so what is a good second best? If you are thinking a purchase of 20 or more this a real service purchase and not, as I thought a few guys wanting to won their own radios - it's to become part of equipment.
On the testing front - anyone with the right piece of kit can do a pass/fail test if the test conditions are known, and to be honest, cheap Chinese radios can often pass these - sensitivity, selectivity and deviation are the usual variables. People usually buy certain Motorolas simply because after you drop them 20 feet, they still work, rarely because of audio quality. Sometimes purchases are simply because the batteries last ages, or they have big knobs that gloved hands can work, rather than ultimate technical specifications. If you look inside an old cheaper Motorola, like the crystal controlled P60s I used years ago, the component count is high, the standard of construction really good - but when you look in modern ones, there really is very little inside at all - certainly very few things to tweak, and the Chinese ones that sell very cheaply are either flimsy, or substantial casing wise - electronics wise, the RF sections are now much simpler.