Steel storage is a high-volume, low-differentiation category where direct factory supply typically produces the clearest saving on bulk locker and filing orders.
Timber and laminate credenzas are usually sourced with the furniture package so finishes match, and are quoted alongside the desking to keep one commercial conversation.
Direct manufacturer supply is used where it is genuinely available for the category and volume. Where a brand supplies only through authorised partners, we buy that route to protect warranty and benchmark it so the difference is visible.