Pricing something like that is tough. The market's way too small to be able to give an accurate answer.
It's worth less than nothing to 99.9999 percent of the population.
But probably worth $250 to that one special person who's been looking for one.
Your trade off is usually time. Price it at 250 and you'll eventually sell it, but it may take a couple years.
If you just want to get rid of it tomorrow, price it around $50.
Feel somewhere in between? then price it somewhere in between.