Follow that up with Lotus Field (currently around $10 but dropping) and a nice group of $45 rares, including several additional Leylines, and Core Set 2020 more than makes up for its cheap land cycle
Players have their own gripe with the set, since Charizard ex dominated the meta for two years before getting pushed out by floodgates like Budew
In theory, this could cause prices to fall significantly, but that depends on how many copies emerge
While you'll find plenty of listings for cards up to NM condition climbing into the $500+ range, there are unfortunately only two recent sales, with an LP card setting the standing market price, followed by a damaged copy that still sold for $180
Here is a photo of the each and then an individual top loader and single oversized sleeve
We know there are 36 packs per box so 10 million divided by 36 gives us an estimated 277,778 total MTG Revised Booster Boxes printed