This document lists different types of computers and their average costs, including desktop computers from Dell, Gateway and HP ranging from $175 to $1,199, laptops averaging $600, smartphones from AT&T, Samsung and Verizon from $120 to $150, tablet computers averaging $800, touch screen computers averaging $1500, Apple products averaging $1000, Surface computers averaging $1800, GPS devices averaging $433, and mini laptops averaging $500.