You don't need to spy. Just visit nearby vape shops and convenience stores that sell vapes. Look at their shelves. What brands and flavors are prominent? What's on clearance? That tells you what's moving and what's not.

Talk to other business owners in non-competing areas. A shop owner in the next town might be happy to share what's selling for them. Trade associations and online communities like the Windbar Community are also useful—you can ask peers in similar markets about demand patterns.

This isn't about copying; it's about calibrating your expectations to the local market reality.