I've been on vacation with no internet for aweek. Slightly differetn twist; last year at a garage sale of a guy who has a great shop and was selling off his "junk", he had a couple of Clark (or Clarke?) metal cutting 7.25" saw blades still new in package for cheap. Five bucks each if I recall. They sat on my shelf until this spring when I did my mower project of cutting 1/4" plate steel. I put one of those blades in a cheap garage sale WOOD cutting skilsaw. It cut GREAT! Beware that the saw us underpowered for the task, the HOT metal chips fly everywhere, and the saw is mostly plastic.
I think the retail price of the blade is $50, and I have not shopped for the proper saw to hold it, so I don't know if the wood saw is too fast or slow for the proper speed of the metal cut blade. Just hate plopping down $50 bucks for something I had not seen proven!