Same answer as whether that's a good price for a crown top - it's entirely dependent on the bottle beneath the top. Codd bottles are ones which are sealed with a marble. It was a popular type of bottle in some parts of the world around the time Hutchinsons were in use, and had a similar idea behind the design. But unlike Hutchinsons, Codds never entirely went away and are still used in a few Asian countries. So it could be a fantastic deal. Could also be an absurd price for an empty Japanese soda bottle that they just finished drinking after buying it at an international food store. If it's a bottle you're seeing described as "Codd neck bottle" with no picture or additional information, it's likely a modern slick (or nearly slick) Codd from India, dating from somewhere between the 1980s and yesterday. Loads of them are brought over here and sold as curiosities because they look old even though they still use them. Still worth asking what it says on the bottle though. If it's embossed from the UK it's not worth paying that much unless it's an unusual colour or something. If it's from North America it's an incredible deal.