Here is a description of the conditions for the promotional products:
"Our promotional products offer incredible savings, but please note that prices are subject to availability and may vary depending on stock. Offers are valid while supplies last. Contact us for specific details of each promotion."
"We would like to inform you that promotional prices displayed on our website and at professional trade shows are subject to product availability and may vary accordingly. We reserve the right to apply these promotional prices as long as they are in effect at the time of purchase. Please note that these offers are valid until stocks last. For any further clarification, please do not hesitate to contact us. Thank you for your understanding."