He might not be spending his own money.
He didn't indicate his age so he could be 15 years old and doesn't care how his fathers money is spent.
I had to get a job for any of my own spending money
However, nil8r is right.
The echo1 AK RIS is probably the best Echo1 has to offer. Probably the only one worth taking care of in my opinion.
Already comes with a full metal body, metal gears, and all around better internals.
All you need to do is get a tightbore, new spring, a midcap, and a new handguard set and you've got yourself a respectable AK.