Under EXW (Ex Works) the seller prices only for making goods available at their premises; the buyer bears transport, export formalities, main carriage, and risk from collection. Because the seller's obligations are minimal, the quoted unit price is typically the lowest. Delivered terms (DAP/DDP/CPT) add seller costs and risk, raising the price.
Reference: CIPS L4M4 Study Guide (v2): LO "Application" - Incoterms responsibilities, cost/risk allocation.

ITT is appropriate for complex/high-value procurements needing detailed submissions and robust evaluation.
RFQ suits simple, well-specified, lower-value buys where price comparison is primary.
Reference: CIPS L4M4 Study Guide (v2): LO "Implementation" - sourcing procedures (RFI/RFQ/ITT) matched to complexity and risk.

The withholding of passports is a potential indication of modern slavery, and the offer of a discount to avoid reporting this is a form of bribery. Reporting these ethical concerns aligns with responsiblesourcing practices and is critical for maintaining a supply chain free from human rights abuses.

Weighted points systems can be time consuming to create. They're very transparent and allow for objective grading of supplier bids (so these answers are incorrect). They are not easy to manipulate and this is an advantage of using them.

Where price leverage is limited, buyers should seek value-adds: extended warranties, service levels, training, spares, delivery schedules, sustainability commitments, or risk-sharing. This aligns with total value and ethical outcomes beyond headline price.
Reference: CIPS L4M4 Study Guide (v2): LO "Application" - value analysis/negotiation with limited competition; non-price value levers and responsible outcomes.