I see a few of you are interested in Stanley planes. Did you see the Stanley #1, Type 1 that sold on Ebay last week for $5,200 (not a typo). You can still view it by doing an ebay search for item no. 300098335485.
Some weeks ago a Bailey's (pre-Stanley) iron smooth plane with split frame sold for $7,134 and was in terrible condition though extremely rare. That item no. is 140087343711. There are collectors and then there are investors.