Primers here run in the low $30's, just about anything you want: Winchester, Federal, CCI, Remington. In the past year I've run into 700X and 800X, and it seems one of the slower Magnum powders is usually on the shelf, mostly W296.
I guess it was easier for the primer manufacturers to increase production than the powder manufacturers. I've read various articles that detailed the difficulties and business risks of building new capacity to produce powder. That, combined with a fire that damaged an Alliant facility and put it off-line, makes it difficult to meet the increase in demand. It would seem that the powder shortage is holding back primer sales. They kind of go hand-in-hand.
The excuse that ammo manufacturers are sucking up all the powder has been disputed. The canister powders that reloaders use is manufactured to hold a high degree of consistency, and because of this it's more expensive to manufacture. The bulk powder that ammo manufacturers use has more variability, but since they buy large lots and extensively test each batch and can adjust they prefer saving the money on the lower production costs associated with being able to accept small variations. It's been stated the canister powders are manufactured in separate facilities from the bulk powder. So the two are not related.
Indeed, the ammo manufacturers order powder custom made to their specifications. It's not necessarily even the same as any canister powder.