There was this big thing over an Italian perfumer(s) who made a perfume that smelled like blood but really if you look on the website it says its "inspired" by it. http://www.bloodconcept.com/EN/index.php There was also that rumor about lady gaga making a blood and semen scented perfume but again "inspired" by blood not actually smelling like blood. Seriously this smell has a niche market, it would sell. Can't even find a blood scented perfume in goth stores.
Well even if its not popular with the masses if you sold it for goth punk and metal subcultures it would be a big hit! Blood does have a smell and taste its coppery and metallic, a bit sweet from the glucose. Definitely has its own unique scent. If you have ever been to a butcher shop you know. Mammal blood smells wonderful. Not trying to be creepy or anything just saying it would be something I would really want to buy.