I saw about the F series here,
https://www.arrow.com/en/products/si-b8t521560ww/samsung-electronics I bought some a while back when they were at like $7.50 or something per strip, but now they are priced at $2 a strip (at least for the time being). I had to pay some tariff fees, so it's a little more than just strip...
www.rollitup.org
I found this because i was looking thru my orders from 2017, and these are the same strips i ordered back then, and noticed the price. I looked thru all the different strip series i could find but it seemed it was just this and the 4k. Back in 2017 i paid $13.84CAD a strip and have been quite happy with them, todays price was $1.72 cad, so i noticed right away.