[torgoguys]

Lots of companies offer this functionality.

One that is very successful (4.5 million sold) is https://thetrackr.com. I have no affiliation--I just hear their ads over and over on lots of podcasts. They sell them for about $30 each, so they are similarly more expensive than AliExpress type ones.

[onion2k]

I'm not trying to defend such a high price point, but there is plenty of scope for adding value on top of the raw product from Aliexpress. Writing good documentation for it, branding it be more appealing to a specific market, writing apps to work with it, releasing library code to build other apps on top of it, etc. The fact something can be bought very cheaply isn't automatically a reason why someone else shouldn't sell the same product at a higher price.