It may be hard to justify paying any sort of money for a product that is essentially just a piece of plastic.  However, this is a highly specialized form of plastic, designed to slide into special pockets and keep your shirt collar looking passable.  For what they are, they do a great job.  You have three different lengths so that can fit your shirts, and they are made of a nice stiff plastic that surpasses the plastic found in the shirts just off the rack.  They come in a nice little box to keep them all together so you won't be searching at the bottom of a drawer when the time comes and you need more collar stays.  I'm bullish on these stays.