Colorado. Taxation. Sales tax Legislature exempts auto sales to out-of-state residents from Colorado's state sales tax. Post Je 4, 1977 p.13 Colorado Revenue Dept. starting to collect use tax from persons who bought boats from other than licensed dealers. Post Je 18, 1977 p,15 Metro sales tax revenues increase 22% this year. Post 0 16, 1977 p.1 End to food tax top concern in tax survey of Colorado senior citizens. 3M F g, 1978 p.22 0