There are thousands of eBay auctions out there right now with misspelled titles. These items often get fewer bids and therefore often have a lower final price. The best way to find misspellings is to use an eBay misspellings search engine.  These automatically generate typos so you don't have to.  The best at the moment is called TypoTracker... it finds over twice as many typos than any other search engine:

www.typotracker.com