If I can make a complete collection, I can get three hundred dollars for it.

Three such collections would take me almost through college, and I've four years in the high school yet.

That's a long time.
I might collect them." "Can every kind there is be found here ?" "No, not all of them, but when I get more than I need of one kind, I can trade them with collectors farther north and west, so I can complete sets.

It's the only way I see to earn the money.

Look what I have already.