Target B2G1 sale appears to have some good prices on Criterion, some Arrow's, and Warner Archive
Many of the newer Criterions are 27.99 ea so around $19ea which is certainly in line with Criterion Flash Sale and BN 50% sales without using a lot of the extra discounts.
Older Criterions are often 22.99 so even better if you were saving them
WAC are a bit more hit/miss on in-stock, but the 17.99 prices put them at least in the ballpark of 4/44 sales.
Arrow seem to be 22.99 or 27.99 for their usual MSRP items which is a bit better than many of the US 50% sales though still well above the direct prices during ArrowUK better sales. But no waiting for the next sale, hoping the newer items are included, and needing to check region coding.
Shout Factory don't seem to be priced as nicely as they were in the Nov sales, but some decent discounts