I sold an unlimited one alongside an unlimited Neo Genesis for $30 (for both). Not sure if that helps, but it sold right away so perhaps I undervalued.
www.amazon.com/Neo-Discovery-Unlimited-Booster-Pack/dp/B0029M1PLK
$25 and that’s a fair price, I predict once these go out of stock they will see a price raise on eBay. I bought 5 packs from this seller when they were $20 in the spring and then the price got raised to $25 the same night.
20-25 for the unlimited and 35-40 for the 1st edition packs have been the norm.