Supplies are in high demand and often difficult to find (or difficult to find at decent prices).
I can't help on the Albums/sheets, as I don't use them.
For toploaders, I usually go with the Ultra Pro "regular toploader", wherever I can find the best price. (Ultrapro.com > eBay > Amazon). Alternately, I recently bought some 55 point toploaders from hfhobby.com, and I like them a lot. They fit chrome cards a little better than the Ultra Pro. Expect to pay $0.28 - $0.30 per toploader, shipped for either brand.
Penny sleeves now seem to cost about 2 cents each. I use Beckett Sheild brand, and have had luck finding them in stock at beckett.com
For nice card holders, go with One Touch (the magnetic kind). I got mine on UltraPro.com and paid about $2.50 each (shipped). The 35 point size is perfect for non-relic cards.
For boxes, I've been using 3000 count 3 row cardboard boxes that I bought on eBay. (7 for $40). I also have this bad boy for whatever I'm currently ripping/sorting that I got from Amazon:
View: https://smile.amazon.com/gp/product/B08JH9P1DJ
If you are in the market for any card stands, I print and sell them. My card Twitter is @breakingbald2, and I've got some pics of the design on my pinned tweet.