If you’re looking to get more traffic from search engines (organic traffic), link advertising, or link building, then you should try Ask2link.
They currently have a network of 100+ niche blogs that have integrated their ad code (including this website).
You could buy and sell text links easily in their Marketplace. Advertisers can pay with credit cards, PayPal, or Google Checkout – you select the websites where you would like your link to appear, and specify the link URL, anchor text, and optional title field.
If you have a website with minimum Page Rank 1, or Alexa rank under one million then you could start making extra income from your website using Ask2link.com