As others have stated, ebay is the way to go. Average sold price, or the highest if you’re 100% they’re unweighed. No one has some kind of accurate price list on these.
I Purchased 4 expedition packs off this seller (corwyns_attic) a while back (40$ each), 3 of the 4 packs contained holos it was insane. I’d recommend their prices. I’m unsure if this topic is even relevant anymore, but these are solid prices.