Ebay bargain hunter!
Often sellers start auctions at 99p or less, hoping a bidding war will erupt. Many items go unspotted, staying at this super-low price.
Lastminute Auction hunts for eBay auctions due to finish within an hour, but which still cost £1 or less. Double-check delivery charges, as some sellers try to recoup costs by charging a little extra (though eBay's now set maximum delivery charges for many categories).
I managed to get a sleep mask using this tool for 1p the other day + free postage!