When you need to purchase a wig don't fall into the trap of buying online from a shop which may be using stock photographs. Make sure the wig has a brand and name listed.
Some on line retailers offer human hair wigs for peanuts, if it seems too good to be true, don't spend your money. Human hair wigs are usually bought and sold at a premium. I originally bought my Rene of Paris from ebay and had extensively researched Monofilament wigs and costed them online.
Rene of Paris
Forever Young (Budget synthetic hair)