Have u considered the side-effects of using finasteride? It's quite a huge decision, but not mine to make
To answer your question:
treated.com is one of the cheapest online pharmarcies and it's not a webshop that is scamming their customers. But they might not deliver in your country, where are you from?
You can get a prescription from Medical Wellness Center for a 50 dollar consultation fee I think and just take your prescription to your local pharmacy.
How huge a decision it is depends on the person. I mean a lot of men have been taking this an awful lot of years at this point. Its pretty safe id say so if you have the money and it bothers you id say your much better off trying it then wondering.