Ok question...I've looked online to see the pricing on this and I can't find anywhere the one he has on. Where did he get this is it hand made? If so he needs to go into business. The other costumes look like cheap knock offs.
it is handmade, from latex moldings. facingcostumes.com (coulda sworn i put it in my comments, but that mighta been on another site). if i remember correctly the guy who made his costume is only going to make like 6 altair costumes total before retiring the outfit, and they will each be a little different and have a unique feature that the other does not have. his feature was, i believe, the retractable spring loaded blade.
well, it wasn't my costume so i honestly have no idea how much it cost. if you have enough ref pics you can probably ask for a price quote, but i know the guy that does the costumes is kind of getting away from making one of a kind things since it takes so much time to make latex molds and whatnot... so idk