Here's a group shot of 4 spiral radio antenna insulators.

Number 1 in the pic is the more elusive left-hand spiral in a straw colour. Numbers 2 and 3 are the common right-hand spiral versions in two different shades. Number 4 is a right-hand spiral in a nice light or ice green colour. I had never seen one of these with any real colour until I landed this one for a few bucks in an eBay deal.

Any ideas what the green one might be worth?