There seems to be a bug in some where in the process that gets card prices.
I noted a specific symptom of this bug when entering a number of card most notably my Ancestral Recall which displays a s being worth $0.00... I think this is a little off.
Not sure what is happening but when I click through to view the card at the vendor there is a price... and my Ancestral Recall not being priced really throws off the price.