Dumb Question Time

I just bought my first Taco; haven't driven a p/u in decades. I'm in central Florida, which may be relevant.

I'm looking at getting running boards and a bed cover. None of the websites for the local business that sell truck stuff, have any prices listed on their site.

Is this a truck accessory thing? Guns, guitars, toilet paper, every product advertised lists prices on their website nearly all the time.

Just curious is there's a reason for this.