actually many underage teens over thousands purchase rated m games at flea markets where vendors sell any game to anyone regardless of age.
Fleamarkets sell older games, not new ones.
What does "over thousands" mean? Probably not their age. Are you referring to their amount? You already said "many", you don't need to refer to
the amount twice in the same sentiment.
Secondly, I'd like to correct what you said; "Actually, many underage teens download all kinds of games from the internet, regardless of their
rating, and install and play them without their parents (or any 'authorities') even knowing (or caring) about it".
Teenagers in flea markets? Really? And "over thousands" (whatever it means - does it mean: "over thousand", or simply "thousands"? Or perhaps
it's a weird way to say "millions"? Still, technically, 2001 would be 'over thousands') is a pretty small estimate - try millions or hundreds of
millions. This is the age of 7 billion people on the planet, and the age of the broadband internet..