Do expensive items need longer timers?

As an e-commerce manager, I'm struggling to understand how timer duration should correlate with product price. My high-ticket items seem to require a different psychological approach compared to lower-priced products, and I want to ensure my discount strategy doesn't inadvertently cheapen my brand or create unnecessary pressure. I need clear guidance on whether expensive items truly need longer countdown timers and how to strategically implement them without compromising perceived value.