As far as price I know times are rough but wouldn’t like to pay something ridiculous but I get theres a demand. I think 500-1000 would be nice bu again beggars can’t be choosers.
Do your own research of course as always with all things on the internet... But in a pinch I believe large pistol primers will work in place of large rifle primers...
I wouldn’t use rifle for pistol or pistol for rifle, but that’s just me. Nothing like messing up that explosive device that’s either right next to your face or in your hand to ruin your day.