How to buy a mango?

Excuse me, I'm quite new to this whole fruit-buying process and I'm particularly interested in purchasing a mango. Could you please guide me through the steps? First of all, where should I look for a mango? Are there specific stores or markets that sell them? Once I've found a mango, how do I ensure it's ripe and ready to eat? Are there any visual cues I should be looking for? Also, what's the average price range for a mango? I'd like to have a rough estimate before I make the purchase. Lastly, is there a particular variety of mango that's more popular or recommended? I'd appreciate any tips or advice you have on buying a mango for the first time.