This is crazy! I can't find small rifle primers anywhere.
Remember, back several years ago, one could simply drive down to their local gun shop or sporting goods store, and shop. Now, it's becoming a big deal finding and paying for any reloading supply item. I long for the good 'ole days.Primers are an investment in the future.
Unfortunately it's expensive to sit on several thousands of different primers. I'm low on small rifle primers, but I have overcome the urge to have everything always stockpiled. I'm alternating stockpiling different primer types, shooting what I have, not worrying what I don't have.
As an example of investing, I purchased a five thousand case of Winchester primers with a promotional mail in rebate a while back. They were dropped shipped direct from Winchester. I knew it was a great deal and after it was all said and done, shipping, hazmat and tax, it totaled about $25/box. I already had some and didn't really need them, but I can shoot my large rifle calibers for years without any worries.
Primer availability is event driven and therefore cyclical as buying surges end up in over satisfied demand. The rebates on primers were a consequence of the last election as no one was concerned about future availability. It will happen again. Invest when you can.
I've got more than that - bought during the "Obama years". But I store mine in airtight MTM boxes with a dessicant packet inside. Like you said "primers last forever if properly stored", so I am taking the extra steps to ensure "proper storage".