Beware, the roofing business is rife with almost as many bad guys as good guys and be advised that galvalume is way more pricey than just plain galvanized pans or painted steel. The painted panels fade, particularly reds and greens, grey will fade too, but not as much.

As most have suggested, get more than one quote and check references. As others have said, the style of the roof, eg gable or hip, will have an effect on price too, big time. Sheet metal roofing is an expensive way to go on this coast, but then again, its all relative, cedar shingles in Egypt will cost a king's ransome. Markets vary.