I feel that ended eBay auctions are a good way to base a fair value. Buy It Now sales I think tend to be a little higher priced but people are obviously willing to pay it if it is sold. I feel like people on here sell items cheaper than eBay, luckily for me. If I were you, I'd base my price off the eBay auctions for the last few days, but if it doesn't sell, I'd be open to offers.