Twitch buttons forAzedioAzide

So I was approached by a mate to make some pixelart twitch buttons for him and these are what I created for him. They are multipurpose so he can use them on other sites. Awkwardly I have no idea what to charge him for them since he wants to pay for them, let me know what you'd pay for custom buttons.

You can find him on Twitch here: www.twitch.tv/azedioazide
(he's new and pretty small)