We've already had a two headed calf on this site, but you can never have too many two headed animals.

There have been 233 visitors to this weird eBay listing so far. It started at $0.99 and is up to $510.00 with ten bids.
Link:
Weird Auction.
Update: There were a total of 16 bids with the top bid being $760.00. Unfortunately, the reserve (minimum the seller is willing to accept) on this listing was not met.
It has been relisted here:
Link:
Weird Auction.
Second Update: The second listing wound up selling for $700.
If you bid on this weird eBay auction, you'll be bidding on the right to press the "boom" button that will bring this lovely building tumbling down.

This one is already up to 956 visitors. There have been 40 bids. The bidding has gone from a starting bid of $100 to $1,501.89.
Link:
Weird Auction.
Update: This listing got 73 bids totaling $5,207.00. 2,035 people checked out the listing.
This young eBay entrepreneur is selling one of her baby teeth. She's asking for at least $7 but is hoping for $100. She needs the money to buy a fairy, a puppy and a mermaid.

There are two bids and it's up to $7.50, so she's made her minimum asking price already. There have been 34 visits.
Link:
Weird Auction.
Update: It seems a baby tooth is only worth $7.50 and two bids. Still, it's more than I ever got from the tooth fairy when I was a kid. It did get up to 233 page views.