Each bundle of five or four cards goes for $39.99 for the regular version, or $49.99 for the foil version
That is way too late, unless almost every card in your deck is a counterspell and/or some time of target damage card
I dont know what its doing in this deck, but a mana dork that also goads a creature while making mana is pretty cool
It does not, for example, change when you may activate abilities that can be activated "only as a sorcery." The last ability cares only about the amount of mana that was actually spent to cast the spell, regardless of its mana cost
Crew and station give you access to larger creature stats regardless of their other effects, while saddle is directly linked to attacking
Which one of those two things you prioritize will depend on your deck and what you are trying to accomplish