Vape pens are very popular these days, so buying wholesale smoking accessories and selling them at your store can draw more people in. There are some cities in the world where you can actually find vape shops every ten or twenty meters, and that certainly is a lot. Although some of them had to close during the Covid pandemic, there still is a lot of interest in vape pens, so that new stores get opened every day.
The success of your attempt at selling vape pens depends on several different factors, including creating the right kind of atmosphere, managing to provide your staff with the needed training on the subject, building good relationships with the suppliers, and so on.
A niche for vape pens may be another good idea. So you could go for various vape juices, batteries, or some kind of workshops that teach people stuff related to the use of vape pens and similar subjects.
Choosing the right type of items for your shop certainly takes a lot of effort and can even be considered an art. There are some models of vape pens that can sell better than others, for instance. It may be a good idea to ask questions in online forums.