are you sure that's normal commission? i just tried the same spread on IB for april, and the commision is only $36 vs $260 optionsxpress charges! ES Vertical Spread (1) ESJ8 P1270 (1) ESJ8 P1250 DAY SELL 10 commission 36.20 USD
As I said, commission on electronically traded options would be lower at IB as you ca n see. If you want pit traded options, the last time I checked, IB won't do it, and others like optionsxpress will charge higher. In that case, 5perside is the best (except NYME options which are at a higher rate) As I said, the online ordering is no so good, but you can always call the trade desk and they take the order or guide you how to enter it.