Why do basic lands not show prices? I remember at one point in time on this app they did. At least maybe special basics like Un sets?
{Plains} for reference.
Edit: so I tried the link 5 times and got 5 different sets. 2 of which from duel decks and they were the only ones with prices.
Alternative to trying randomly is to tag the name in the card viewer. This shows all copies of the card.
Then, use the right-hand lower-corner cog, press ... And select list prices.
When I did I saw I had prices stored for Tarkir plains, @ 14 ct mid. So they have been there.
Currently, I seem to only get value for the BFZ plains.