Where to sell Helium Mobile?

I'm curious to know, where exactly can someone sell their Helium Mobile tokens? I've been holding onto some for a while now and am looking to cash out. Are there any specific exchanges or platforms that specialize in trading Helium Mobile? Or are there any guidelines I should follow to ensure a smooth and secure transaction? I'd appreciate any advice you might have on the best places to sell Helium Mobile and any potential pitfalls I should be aware of.