I don't know what country you are, but in both the countries I lived in, pharmacies are more reasonable, especially for adult buyers. They would usually ask if you have an old prescription (maybe dating back a year or two), or perhaps your old inhaler, and would generally agree to give you a new one.

Of course you'll pay the full price, no insurance, unless you have a valid prescription (generally a year old at most), but otherwise, the price isn't too steep (about 6€).