I don't know if you all have checked out the current prices for what is being referred to as the pre-release Tamagotchi Connection benefit auction mentioned before in the news here... But the prices are a lot lower than I expected for the unsigned (and some of the signed) Tamas! Check them out by clicking here. In some cases it looks like these might be cheaper for US buyers than buying from overseas. Either way it is for a great cause.
Please make note of the questions regarding if these are actually Tama Connections or Tama Connexions as discussed in the forums here.