well, its all suply and demand. but i can tell you i for one used to nab up all I saw when they were a million or less. And the most i would imagine... hmmm... it wouldnt suprise me too much if someone paid $20 milliion for them but i wouldn't bet on it.
party hats? you can forget that idea, we can't put party hats on the market. but we CAN put them in a trade window and we could find out how much someone is willing to pay for one! I'll put one mine on the market in an auction today.