JL
Keep in mind that even though a knowledgeable collector has put a price on the bow, it will all depend on when you put it on ebay, who and how many people are bidding on it, and if there are any other bows like it at the time. Your best bet is to try to put it on ebay when it is the only one like it at the time. Less competition against your auction.
I have seen people put bows on eBAY and were shocked at how much they got for them. At other times I have people get really disappointed. It is all timing. Also, I would never have two bows up for auction at the same time. Why compete against yourself.
Just my thoughts