How To Buy A Guitar (or any instrument)

I'm always amazed at how little people know about purchasing the right instrument for themselves or their children.
Worldwide research has shown that playing a musical instrument has real benefits.
For example, children who play music have improved vocal, vocabulary and memory skills by the time they become adults so So learning an instrument is a desirable thing. But,so often, I see children trying to play unplayable instruments because parents have bought an instrument not knowing the basic principles.
This is a simple guide to enable you to make good decisions and get the best value instrument whether you're a beginning, intermediate or advanced player.