For this card's 1st effect, you declare a digivolution, then upon revealing this card, you can also choose a Tamer as the card to digivolve, and that Tamer is also treated as a level 3 Digimon
This, at least in part, probably explains the higher deck price, although to be fair, if Legacy is your primary format, new players have to buy a Legacy deck if they want to play, so the comparison to Magic's Standard seems reasonable
Finding the best wholesale price for your cards Competitive Buylisting Partners We check buylist prices at several large vendors, like Card Kingdom and Star City Games, as well as private vendor buylists not open to public submissions
Heres my confession
Each of them becomes Cyber Dragon while theyre on the field, giving you up to fifteen possible copies of Cyber Dragon in your Deck