Those signs are desirable by a select group of collectors who understand that type of sign. The value would be very subjective. The right guy might pay the $3300, maybe a little more; but guys who don't value "production" signs will not pay much. Those signs are hard for beginners to authenticate which always leaves doubt in a lot of peoples mind such as "what would keep a local sign guy from just cutting some metal and making this up?". I love stuff like that. Hope that helps.