EVERY big box store is the same. They hire "staff" or "labor". There is very little, if any, training done. Your only hope is that the staff member working that department uses those products as a hobby of his.

For example, someone behind the gun counter who owns many firearms himself and shoots regularly. Or the young man in the car electronics section who you think probably doesn't know anything, but in reality, it has been a hobby of his for over 10 years. Or the girl who works in the video game department who has played every single video game ever made and can recommend a title for your son based on the collection he already has.

You guys get the picture.