CodeCanyon - ADD-ON: Buy and Sell Ads v3.1.5
This Wordpress Plugin is an ADD-ON for the "WP Pro Advertising System" plugin. It allows you to sell your advertisement spots on your Wordpress website. It has many powerful features to sell advertisements on your website, manage campaigns and banners and track clicks, impressions and CTR all in just a few seconds. It uses the Paypal IPN or Stripe to handle payments.