Paper money is worth the paper it is printed on.
Great! I'll send you a full ream of 500 sheets of 20 pound 96% white paper, and you can send me back 1500 single $1 bills (about the same amount of paper).
Just PM me an address and I'll get it shipped out immediately!
Oh, and I'll even save you the return shipping on the 1500 dollar bills - you can just PayPal the money, or use a US Postal Money order...