I found a real human hair braid once at ThriftTown and sewed it into a novelty Six Flags hat, the kind with the flaps in the back, for a friends costume once.
Total cost: $2.50.
I really wanted to say: “Priceless” but, since I don't have the picture to back it up, then actually saving money on something so horrid seemed more worthwhile. (PS: mine looked real)