Market is volatile as always and most of the card prices has changed since season reward distribution. Rusty Android now is selling for 1 cents and other common cards were also selling for 1 cents. It means that after 2-3 reward distribution reward card prices can go more lower especially common cards. Hobgoblin performs well with keeping stable at 4 cents, Lord Arianthus fell down from yesterday's high of 1.30, Creeping Oze went up from 3 cents to 4 cents and l think this card is one of the most valuable reward cards, Goblin Mech also went up from 2 cents to 3 cents.
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From @smalien