From time to time, these cards show up when recipients, unaware of their worth, sell them, having never been interested in Magic: The Gathering
I personally believe synergy plays the most important part in deckbuilding and many times some theoretically weaker cards can have so great synergy with your deck/strategy that they can be greater options than the general best overall cards (and can be a super budget option too, as they only work with too specific decks/strategies.) Synergy applies to all categories analyzed in this article but also to cards that do not fit in any of the categories above but has a unique utility
Edgar provides some pseudo-wrath-protection: If your board incites the Wrath of God, Edgar Markov's Coffin helps rebuild by generating a couple tokens
With a few triome lands and Leyline Binding, you can get Nyxborn Behemoth out ridiculously early
Notably, while these Cids are the same card, you can have any number of Cid, Timeless Artificer cards within a single deck