No idea what the usual price is on these, but have you reached out to local hospitals to see if they are interested? I know the hospital I work at is starting to have trouble sourcing supplies. May be a better use of these masks than selling to randos on the internet.
My rate is about what you would pay at an Ace Hardware - so high end retail. The difference is US based shipping, and all of the pieces needed to make it work well come together. I have contacted my local hospital with what they need to get (not trying to hawk my wares). But the problem is middle management rent seekers in both our govt & medical institutions will happily allow their own incompetence to throw ER doctors & everyone else under the bus. The time to order N95 masks IN BULK was January. These are next on the list but I seriously doubt they are getting them either & I expect them to be out of supply in short order (Pence is already requesting construction companies donate these / not order any more).
US based manufacturing got a huge contract from Singapore, HK & Japan for 100,000,000 orders on disposable N95s before the administration put their order in. Add in the fact that 90% of these masks come from China & haven't shipped for months - our entire system is a clusterfuck. I feel terrible for old doctors. But if you want to pay someone in admin $100K a year who has no idea on what supply lines look like, then ignores every red flag in the book - I can't fix that.
I've already clued in a few doctors who are concerned including ER docs. I would happily sell my supply for 2X what I paid for it or point anyone in the medical field in the right direction (door is closing fast on that).