Rare Baseball Card Found in Maine Worth Hundreds of Thousands

Pity the poor slob who sold a rare baseball card in a yard sale for next to nothing! OUCH! Found in a family photo album, an 1865 Brooklyn Atlantics baseball card will be auctioned off in Biddeford, Maine.

Right now ESPN is reporting that bids for this card could be in the six figure range. There are only two known cards, one of which is in the Library of Congress! So, here's my question:

How much would you be willing to bid on this card in Biddeford?