Welcome to the addiction. As has been previously noted, the answer depends on the specific series, player, and the eye appeal for a given card. The most common of commons in poorly centered condition might be a $30-40 card. A "common" from the high series with perfect centering might be well over $1000.
Even among the same card prices can vary wildly. For example, a "typical" #80 Herm Wehmeier might be a $40 card. If you have a perfectly centered copy in the same grade, you might push $600. It's a card that's never centered, so if you find a unicorn version that is, you'll have to pay a healthy premium to get it.
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