Corkscrews are collected across the world. They vary from the most simple to the most ingenious inventions, just being interesting and/or providing improved ways of getting to the precious liquid. To be of value to a collector the corkscrew has to be rare and also be in a state close to its original condition. The price can vary from say $50 to several thousand for a very rare object in a near to original condition. It is very important that the corkscrew has not been polished or re-grinded, modified or parts replaced. 
Below is a representative sample of collectable corkscrews showing different types and prices. 

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