Just because it's listed on ebay for High $$$$'s doesn't make it worth that! It takes a few in Same condition that SELL to establish a worth.
Having 1 of 1 Known doesn't make it collectible or valuable.

Reproduction/Fantasy Cans
http://i124.photobucket.com/albums/p2/oldegaspump/AllCansMASTERTHUMBNAIL_zps4bfdbbc7.jpg
Rnd Can Re-lids