I do likewise. I watch for sales on items. I have a fair amount of powder, and primers, and bullets. The only two items is Varget and H1000 powders. I never used them before, and looking at it now. So I wait and watch. If I am in a store, I watch for sales on items even though I may have a stock of what ever. I will add. The worst of it is, I am having a wildcat being built, and really not sure as to which powder and primes are going to work out.
I had gotten a M-4 a few years back. Got some 5.56 ammo for it @ $0.28 per round. I noted in 2020 or 21 that there prices was $2.00 per round. So I began to watch the prices on that round. Now it's about $0.55 per round. It's just gauge on pricing. I watch the net all the time.
Powder is showing up more and more. Several months ago anything that came up was gone. Now some of the less used powders are staying around on the adds.
I find that reloading equipment is hard to come by at times too. Or there a waiting list for items. Items come up and are gone.