All of the factors you listed can be conceivably factored into the price and/or be part of a purchase commitment. The fact it hasn't either means:
a) the increased price isn't something the market is willing to bear. I'm skeptical about this because the presence of scalpers on the market makes me think that there are at least some consumers willing to pay insanely high costs for masks. I will also go on a limb and say most people would probably be willing to pay 2-3x "normal" price for N95 masks (a quick search on archive.org says they normally retail for $1/ea when purchased in modest quantities).
b) the owner is behaving irrationally from a profit maximizing perspective, perhaps because he got burned last time or thinks any profit isn't worth the hassle.