There is no point comparing pricing with places that are using inferior or low quality technology or processes. Here is a quality comparison spectrum.

Tech comparisonPrinting typeInk typeCoated / LaminatedQuality
KA CanvasAqueousUltrachrome HDX
(pigment)
Artshield or Timeless
(size dependant)

Highest



PhotohopAqueousUltrachrome K3
(pigment (old tech))
yes
Print Art PhotoAqueouspigmentyes
PosterjackHP LatexLatex inkNo infolow (latex ink)
Canvas ChampSolventSolvent ink"Chemical Layer"Inferior
"Best Canvas"HP LatexLatex inkNo infoInferior
Walmartlollollollol