As a general rule, try to start at no less than 50% of the asking price
Then check out this Zedruu the Greathearted deck that came in at $34.29
It doesn't copy whether that artifact is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, or so on
As a beginner seller, or someone who just wants to quickly offload a collection, eBay or Mercari may be your best bet, but it still doesnt hurt to be cautionary about listing upsells
The four-cost uncommon will draw two and then lose 2 life and make a Black Wizard dork and then pump them with lifelink and power too
Honorable Mention 2 Not every deck gains life, but those that do will likely enjoy the effect this card brings