Depends on the provider and if it's burtable or capped or average billing.
Many factors my man.
I can sell you capped bandwidth really cheap like most do but you connection will slow down durring peak hours or durring unusual bursts. $30
Uncapped bandwidth that only charges you for the 95th percentile should be about $50
Average billing bandwidth should be about $100 if it's reduntant and with a premium provider.
More then this but here is a little summary
good luck