1. You can set the prices from your ads from within the ClassiPress admin dashboard, so yes, you can create a $10 per ad price if you wish.
2. The duration of the ad can be whatever it is you wish it to be based on your listing period or ad pack. No, the duration does not start over again when a customer edits an ad.
3. You can upload your own logo in the settings "Web Site Logo" as seen in the
ClassiPress admin demo
Thanks :)