At best, it's probably someone selling off extra chicks from their hatchery order, plus a little profit. Many suburbs allow hens but no roosters. ( .... BUT It's obvious they don't breed chickens ) I'd be a little upset if expecting a "hen" and received a chick or rooster, though.Probably a scam for sure!
Just look at the location map. Doesn't look like chickens would even be allowed there.