Wait 5 more years, then we'll help. We don't condone minors with airsoft rifles, even the cheap shit.
That and you're looking to buy cheap shit out of country. Again, a no go here.
Try again later.
Edit: Ah, you're currently in the US.
Keep your cheap airsoft shit in the US, but it'd be ill advised if you braught it into country. In most cases it will be consfiscated. With your given age you'll find very few that will want to help you
instead. They'll give you advice on your cheap shit there.