Go to advanced search.
Check title and description.
Check items priced from ______ to _______ and enter .01 and .40.
Check auction.
Check free shipping.
Then at the top at the search bar. Enter pen,book,bead,car,screen,phone,cent,penny,red,coupon,stamp,coin,ebook,bag and etc. pretty much anything random you can think of off the top of your head.
Then I look at the lowest priced listings and sometimes the ending soonest.
Whats so great about using advanced search is it narrows down want you need for cheap feedback and you're searching all categories at once.