Q1: Why doesn't this article have more information on blocks/crafting/mobs/entities/mods than it does?
A1: Wikipedia is not an indiscriminate collection of information, nor is it a how-to guide. Articles should strive to present a broad overview of their subjects. Video game articles in particular try to describe general mechanics and gameplay instead of specific details. This helps to keep the article accessible to readers who may not otherwise be familiar with Minecraft.
Q2: Why doesn't this article show the prices?
A2: Wikipedia is not a directory. Product prices should not be quoted in an article unless they can be sourced and there is a justified reason for their mention. In general, if mainstream media sources (not just product reviews) provide commentary on the price of an object instead of just passing mention, this is an indication that its price may have encyclopedic significance. Prices listed by individual vendors, on the other hand, can vary widely from place to place and over time. Wikipedia is not a price comparison service to be used to compare the prices of competing products, or the prices of a single product from different vendors.