What would you value it at? probably like $35-$45 is my guess, but I'm not really into ancient coins.
I would guess the value to be less than $20. But, then again, I am a bottom feeder and find these types of coins reguarly for much less than you suppose.
It's cleaned to death sadly.... the detail looks good though and the coin well centred, but these tetrarchic folles usually are. Value.... here probably about 12 gbp.