Bulk pricing
Priced per unit; vendors typically quote against a primary quantity around 1 unit.
No. Commercial-grade hardware is reusable for years. Buy the frame once and reorder only the printed graphic, which is the cheaper part.
Mechanism grade. An economy unit and a commercial one look alike on paper but the cheap one fails sooner. Pin the hardware grade before comparing.
The same product family is tracked in 4oz stock. Quotes are NOT interchangeable across variants, so match the spec before comparing.