The 10 Most Expensive Magic: The Gathering Modern Staples Prices Before and After Covid-19
3Scalding Tarn

Current Price: $72
Pre-Covid Price: $68
Change: $4 increase
Everyone has been complaining for ages that Scalding Tarn is way too expensive. Last year it hit as high as $110, then fell down into the upper $60's. It's rebounded a little bit over quarantine. Not bad.
4Cavern of Souls

Current Price: $71
Pre-Covid Price: $57
Change: $14 increase
Better pick up your high value Modern lands. These cards just keep going up in value. Cavern has gone up by 25% over quarantine. It sees play in a variety of decks, including the new Modern Goblins deck.