What should you look for?
Quality and great customer service. I have used HS Strut and Primos calls, they work fine. But they are machine made and mass produced.
Since I started using HOOKS calls, which are hand made, I love them and have improved as a caller.
I have only been learning the mouth call for 3 years now and try to add a new call each year. I can purr pretty good, but can not Cackle to save my life.
Practice, practice, practice.
John