We have been buying extra strong PG Tips British tea from Amazon because we think American tea is way too weak. 3 boxes of 80 were about $40 last time I bought them a few months ago. They’re now $80. Thankfully we discovered we can get an order of 6 for $60, but we have to wait until mid-February for the to arrive. Meanwhile, a single box of the same tea, which we’ll have to get in the mean time, is $20. Yes, a single box is less per box than a 3-count box order, but you still save if you buy 6 boxes. How does any of that make sense?
It’s algorithmic to get you to pay more. The price will go up during high demand. Their “sales” are often more than the normal price. Then the price will go back down when demand falls. It works (for Amazon).