Will timers make my store look scammy?

I'm concerned about using countdown timers in my e-commerce store. While I want to create a sense of urgency and boost conversions, I'm worried that these timers might come across as manipulative or cheap, potentially damaging my brand's reputation. How can I implement timers that feel authentic and genuinely helpful to customers, rather than like a high-pressure sales tactic? I need to understand the fine line between creating urgency and seeming untrustworthy.