Disposable: Most disposable face masks are three-ply and come in packs of 50. These run between $25-$35, or .50-.70 cents for each mask.
Reusable Accordion: these range on average between $3-$7 each. Multipacks will get you your best savings, with a number of retailers selling three- and five-packs.
Multiple Layer: Non-accordion, multi-layer masks have the widest price range and come out to around $4-$15.
Multiple Layer with Nose Wire: Most reputable retailers are selling these for $9 or more.
Multiple Layer with Breathing Valve/Filter: These run on the more expensive side, with the average price running around $11.
Carbon/HEPA Filters: These almost always come in multi-packs and run on average between $10-$32, depending on whether it's a 10-, 20-, or 50-pack.
Ear Savers: These average between $.50-$2 each and almost always come in multipacks. Etsy and Amazon are where you will find the most affordable options.