Heyyyy that sounds awesome! The pricing depends on the ad format, ad length and for how many days you wanna let it roll. In short: Advertising on 3speak.tv is not expensive at all and if you secure the 50% discount by booking until the 1st of Novemeber the prices will not change for you for a whole year.

To make the pricing a bit more transparent upfront:
I just added a neat little diagram on the price calculations at the bottom of https://3speak.tv/advertise where you can see how the price will be depending on your individual settings:

If you have any more questions just let me know!