Building an online classified ads business is proving to be a very successful concept. While people generally expect to be able to post text-based ads for free, you can generate income by allowing people to post enhanced advertisements (e.g., ads with pictures) or classified ads with hypertext links to a Web site. Additional revenue would come from direct advertising sales (e.g., banner ads). An option you may wish to consider is setting up an e-mail system for your users, where they can register for a free e-mail account. You could then send them advertisements based on their opt-in preferences.

Coupons, auctions, real estate information, and so on, are all related topics that would be appropriate for your site.

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