I was just pondering grabbing some Astra SP, as they're 9.99 shipped for a hundred pack on Amazon right now (at least for Prime). I'm usually buying Feathers, so these are darn cheap! It got me wondering, what's the cheapest blade price out there on a per blade basis (any brand). 9.99 cents for the Astra's is the price to beat . I've heard of some down in the 7 cent range, but don't recall what brand. If you happen to have a source, point that out too.