But that's the point, really. If my house is on fire, what I want is a single fire truck to turn up as soon as possible and do whatever it takes to save as much

But that's the point, really. If my house is on fire, what I want is a single fire truck to turn up as soon as possible and do whatever it takes to save as much of my stuff (without endangering anyone) as possible. Three fire trucks is unnecessary (and inefficient). Wasting time arguing about pricing is counter-productive. If all my stuff is burning then it's reasonable to assume that any savings I might get from a better price is going to be outweighed by the extra damage done in the time it takes to agree the price.