Just to hazard a guess, the manufacturers have likely been focussed on .223, .308 and pistol ammo. Now, with hunt season here, the .30-30 folks have been buying more from a relatively small supply.
If you cant find any locally go to ammoseek.com. The first in stock online store has it for 16.50 a box. Federal power shok 150 grain. Ablesammo I believe.
you have to look hard for anything. everything is a cycle. 22 is in a cycle right if you can believe it. but its mainly just advertised with a price in print catalogs... websites tell you differently.
I saw some 30-30 ammo at dunhams sporting goods but then saw the price 27.95 for a box of core lokt Remington damn near choked last year they were 13.95 a box