From times to times I check market to see which cards get cheaper. Last times I noticed that when I sell beta cards even at cheaper prices l wait a lot to see that my cards are sold. Right now most undervalued card is Marlic Inferno. If you buy this card at this super cheap price then you can easily make 15-25 percent profit in usd. Another undervalued card is Pot Orge. I myself surprised to see this card at this cheap price because this is a rare card and even most common cards are trading at 4-5 cents where this rare card is traded at 4 cents.