There's countless ways of adding "hidden charges", some make a career of it
I know of one of the big boys that quotes low, then you'll find practically every job has waiting time added
Not a way i'd want to do business, ripping off your customers, but doesn't seem to stop some.
Or there's the "fuel surcharge"... Again, sneaky
The problem we've all faced at some point i'm sure, is sometimes its the accountants that pick the courier, not the one who actually uses us, and thats exactly what lets in those that quote silly, then "adjust" their prices later
I like to think that honesty is best, but maybe thats my problem... lol