Purhase sensors-cheap

I have had a Dexcom for about two years. I stopped useing it but would like to start back up. I am in college and don’t have a whole lot of money to fork out on sensors. Do any of you know how I can get some sonsors cheap. I have insurance bout I can not afford my out of pocket cost. Is there a company that would accept my insurance payment and write the rest off? Any help would be accepted. Thankyou.