I also live in Colorado. It is still legal for vendors to offer discounts if you do not use a credit card. Some gas stations have lower prices for gas with cash

I also live in Colorado. It is still legal for vendors to offer discounts if you do not use a credit card. Some gas stations have lower prices for gas with cash versus card. If you are buying something you bargain for (e.g., furniture), you may be able to negotiate a lower price with cash versus card as well.