This is the "vanilla" decklist: Rebuilding the deck is basically the usual process - remove ETB tapped lands, substitute in "better" aka typed duals, more basics (yes more, most precons have unnecessary non-basic duals, and then run cards like Kodama's Reach and Fertilid, such that they can quite easily run out of basics to search for.) Focus on the core aspects or the deck - getting +1/+1 counters out on small creatures and spreading them around, then leveraging the growth in +1/+1 counters via varied abilities to turn small creatures into big fatties
Of course, the base rarity of these cards undoubtedly contributes to their high prices, but it is still notable that the Japanese version is worth nearly triple the English version on the secondary market
There is a good reason for that the back of the counterfeit Blastoise card is, in fact, a genuine Magic: The Gathering card
Dragonite ex costs 1250 Pack Points to craft
Theres definitely some age showing in terms of how it interacts with the current Modern format, but the fundamentals are still good