I'm surprised that as of this writing, none of the reviews on this page have mentioned Lórien's Wealth yet. I started with the revised core set and as soon as I saw the two right next to each other, I wondered what the use of Gandalf's Search could be over Lórien's Wealth. Sure, you can pay 1 resource to have any player draw 1 card with Gandalf's Search, but as soon as you pay 2 resources to still only draw 1 card, it loses to Gléowine (also in the core set), and if you pay 3 resources, it loses to Lórien's Wealth, and it just keeps plummeting from there on out. Sure, you get to rearrange the top of your deck, but isn't drawing cards better than rearranging them almost 100% of the time? Especially on a one-shot effect where you have to pay more resources to look at and rearrange more cards. And by the time cards and scenarios came out that finally did care about the top cards of your deck, we had already gotten much better deck rearrangement options like Imladris Stargazer and Wizard Pipe. The only time I have ever used this card was when playing the mono- starter deck from the revised core set, and that was only to pay 1 resource to draw 1 card.
I did see a comment on a Youtube video a while ago (I don't remember which video) where the commenter had made a house rule errata for Gandalf's Search: it costs 3 instead of X, and lets the chosen player search their entire deck for a card (and then shuffle their deck) rather than searching only the top few cards of their deck. I wonder, if that were the case, how much more play would it have seen? Would it have been worth it to use a deck slot and pay 3 lore resources to have a player search out their combo piece? And, on the other hand, would it have been healthy for the game to have a deck-searching card right from the beginning? But I'm not a designer.