"Leave out the "y" in Playstation, it won't basically come up as a search result," said Jeff Bakalar, CNET editor.
If an item is hard to find, it won't have very many bids on it.
There are now services that search for typos to help you uncover hidden treasures.
"They will take your search term and run it through their sort of software algorithm that will generate literally hundreds of different misspellings for the search term you inserted," Bakalar said.
Most of the services, which are free, scour eBay. But some also find bargains on Craigslist and provide links.