I noticed those at my local HD for that price several months ago. I can't imagine they're very good blades, but perhaps for MDF of less critical cuts they'll do.
I have some Hitachi miter saw blades from a while back, made in France IIRC, and very good blades.When they were made by freud, they were pretty good. Now that they are made by some Chinese manufacturer and just stamped with the Avanti name, they suck. Granted its a 2 pack, but for about the same price, a single Hitachi 72 tooth will probably outlast both of these and have a better cut.
I'd even prefer the dewalt series 20 construction blades over these.