The manabase is budget, Tower and Check lands are good, but even on a budget there's lands to consider adding: Unclaimed Territory Exotic Orchard Caves of Koilos Battlefield Forge Tainted Field Tainted Peak Smoldering Marsh More expensive options: City of Brass, Godless Shrine, Blood Crypt, Sulfurous Springs, Sacred Foundry, Graven Cairns, Fetid Heath, Rugged Prairie
When it comes to understanding the price of these cards, its all down to their rarity and desirability
The second where you can find zero is attack costs
We can see this being a Commander staple for Simic decks going forward , and the card is also more than viable for Standard, although it may take time for it to find its feet in the current meta.
A grandfather paid 100 for the Pokmon Fourth Print Base Set Booster Box from a shop in Chester in 1999