Canon offers its factory-refurbished Canon Speedlite 270EX II Flash, model no. 5247B002, for $79.99 plus $11.99 for shipping. That's $47 below the lowest total price we could find for a new one, although we saw a refurb for $2 less last November. It features a vertical bounce capability up to 90° and slave function. It requires two AA batteries (although it's not clear if they're included.) A 1-year Canon warranty applies.