well I can assure you a lot, or most, have NO product knowledge. Case in point.
House is built and designed in metric. Tiles are built in metric. Tiles are priced in sq yds. WTF is that about ?
My wife picked a v.nice tile for the house. Saw same tile in another shop, 20 miles away. Same box, mfr, tile. Identical. Far away shop was 38 sq yd, local was 32. Far away matches price with no effort.
I know someone who went to spain and bought the whole house worth in one go, and had it shipped by truck. 1/2 price of here.
Ditto on Bathroom stuff. Local place was +200 for the bath. Told they were out (and that's 200 out of 1300, btw.......a big %), and shop agrees to match, on the spot, no question.
Makes you wonder about the margins..................