Local game stores buy cards at a discount and sell them at market value to make a profit, so you will get less in return compared to other options
The risk with general marketplaces is always counterfeit products stick to sellers with extensive positive histories and avoid listings priced significantly below market value
For context, a typical development guide that we would make for a Universes Beyond set is probably closer to 120 pages
You can drop this on turn three, sacrifice a two-drop artifact dork for two cards and two mills, sac it to Goblin Welder to swap for something you just milled or what you sacrificed, and then swap the sacrificed or milled card on turn four for this to keep
Sylvan Tutor Sylvan Tutor is a 1-mana sorcery that tutors any creature straight to the top of your library
These decks are all a bit underwhelming, but that is for a good reason as they make it super simplistic and cheap to start playing