Priced per unit with quantity breaks. Vendors quote steps at 1 / 5 / 10 / 25 / 50 units, and the per-unit rate drops at each break.
Often a name-brand base versus a generic equivalent. Confirm both vendors are quoting the same item before comparing.
It costs more than a one-color print but suits complex logos. For a simple mark, a one or two color print is usually more cost-effective.