Multiple questions: Email, sale and buttons

1) Email notifications – is this available or in the progress?
2) Is there any function to display items currently on sale. So it’s possible to input sale price but the ordinary price is still listed somewhere.
3) Is there any possibility to disable the “buy here” button on certain gifts. Right now, the only way I can accomplish this is by setting the gift as unlimited.

Thanks for the amazing plugin and your support!
Best regards, Marcus