PBS shop seems to be having a huge sale right now (maybe to generate cash flow and maintain liquidity during this difficult time):
https://shop.pbs.org/Lots of DVDs for only $5.99 each and 45% off spring clearance.
Note, not all items are eligible for the discounts. Those items eligible for the discounts have a red banner with either:
"Only $5.99"
or
"Extra 45% Off"
Free shipping on $79 or more.
Side-note: In the fine print on some of the on-sale items, it says no shipping to Canada due to limited US rights. Sigh...we get screwed up here in so many ways.