With only one prior printing, we can expect a meaningful drop in price, often between 30-50% over the weeks following the release of the new set. The card's usage in Commander and other casual formats, where multicolor decks thrive and card advantage is crucial, may cushion the price decline somewhat. However, the influx of new copies will likely drive the price down significantly.
If you've been wanting a copy of Relic of Sauron, hold off a few weeks after release to take advantage of the likely price drop. For those who own multiples, now is the time to list them before the market becomes saturated with new stock.
Relic of Sauron