Dena Patterson, 79, said she found the rock while walking through the woods in West Virginia in 1996. She has been using it as a doorstop ever since, The Tampa (Fla.) Tribune reported Thursday.

Patterson said she decided to sell the rock to raise money for a trip to visit family members in West Virginia.

"I expect to get a lot of money," Patterson said.

"This is a rock. It's not like it's a piece of cheese," she said, making reference to the infamous grilled cheese sandwich that allegedly bore Mary's image and sold for $28,000 on eBay.

Patterson said she is seeking local buyers because she does not own a computer and does not know how to use eBay.