Even if clear and bright, I wouldn't ask any more than $30 each based on age alone. I would also make it crystal clear to the buyer that they come with no warranty (buy a spare) and are no longer made (not available new). Would probably also mention that LED replacements are roughly $50 each and all have to be converted at the same time. Cover all those bases and you're good. I've sold a few over the years and my price has dropped due to age.