Priced per unit with quantity breaks. Vendors quote steps at 1 / 5 / 10 / 25 / 50 / 100 units, and the per-unit rate drops at each break.
Almost always construction type. Temporary corrugate is a fraction of a permanent metal or wood fixture. Confirm both vendors are quoting the same build before comparing.
Displays are bulky, so carriers bill on dimensional weight, not actual weight. Designing the unit to ship flat or nested lowers it.
The same product family is tracked in 1×3, 4×3. Quotes are NOT interchangeable across variants, so match the spec before comparing.