i have had several insurances and switched between sometimes having to pay upfront cost, for a 10/ml vial it is around 230. I know, for example, I need around 9 vials per 3 months. pretty expensive stuff.

*edit, as I am on an insulin pump I only take fast-acting insulins. Lantus/Levemir other longer acting insulins usually are more expensive than the fast-acting stuff.