Noone likes to make a bid that won't reflect on their account until 5 days later. That's an easy way to overdraft and lose track of how much money is tied up in bids. 3 day auctions are the way to go.
The price will skyrocket the last two days.
The individual who refuses to defend his rights when called by his Government, deserves to be a slave, and must be punished as an enemy of his country and friend to her foe. - Andrew Jackson