Crim's deck even had Mana Drain, a $50 card in paper, while Richard's had a $80 Oboro, Palace in the Clouds, a $46 Sylvan Library, and a $52 Cloudstone Curio, all in a deck that cost less than $5 total
These are the two most popular archetypes in the metagame according to MTGgoldfish at the time of writing
As always, there are also traditional foil versions of cards, and you can safely assume that the foil version of any given card is worth a bit more than the non-foil version

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The downside is that Loki and the copy must attack and without any evasion Loki is a target for blockers
The one-case-a-store scenario is probably low