I would say it is worth $500 to 1K just because it is a legit word and there are enough people who attach value to dictionary words that it will attract some interest. If you find someone who appraises it higher, then make them put their money where there mouth is. Anyone appraising higher than 1K should be willing to buy it for the price they mention.
I would rather have $500 in cash than the name, if I could choose either one.