1867-5309

The phone number "867-5309" sold on eBay for $365,000 in 2009.
2Billy Graham

Wrestling legend Superstar Billy Graham sold his WWE Hall of Fame ring on eBay because he was pissed at Vince McMahon.
3NASA

In 2002, NASA bought servicing and support gear for shuttles on eBay because components were so out of date they were no longer made. They brought 1970s Intel 8086 chips and eight-inch floppy disk drives.
4Beethoven diamonds

Three diamonds were made from strands of Ludwig van Beethoven's hair, and one was later sold for $202,700 on eBay.
5Gmail

When Gmail first launched with 1GB of space, unheard of at the time, invitations were sold on eBay for as high as $125.
6Cornflake Illinois

A cornflake, shaped like the state of Illinois, was sold on eBay for $1,350.
7A-12 Avenger II Stealth Aircraft Canopy

In 2011, a classified stealth aircraft (A-12 Avenger II) canopy appeared on eBay for $620,238. Little has been written about it since.
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87-legged spider

A man once tried to pay an outstanding bill of $233.95 by providing a drawing of a 7-legged spider. They refused to accept the drawing as payment, and it was eventually sold on eBay for $10,000.
9Recipe section

There is a recipe section on eBay (and people actually pay for them).
10The Walking Dead comic

The No. 1 'The Walking Dead" comic was sold for $10,000 on eBay.