I think the lowest I saw Flash S7 was $11 or $12, mostly checking Amazon and Target. And that's one of those seasons where I'm willing to wait it out to get it for a certain price.
But yeah, COVID definitely threw a monkey wrench in the usual schedule for the DC shows. Normally, the seasons...
GRUV is also selling at least some of those shows at this price through walmart.com. I just got Flash season 8 and Superman & Lois season 2.
(Which is funny because I haven't seen Flash season 7 drop down to $10 yet.)