This is to ensure that people do not make ads that are either unfair or do not agree with the message the candidates are trying to promote. This ensures that people do not make ads that are wither blatantly false or contradict the candidates message.

ads

There are many possible ways of adding advertising. The key aspect is to ensure that the ads you're displaying are compatible with the image of your business you are trying to convey. From that perspective Adsense is good because the ads are targeted and thus will be more relevant to people browsing your site.

Newspaper ads, magazine ads, internet ads, etc..

The best places to check will be your local pawn shops or private ads in your local paper. Doing this will ensure that the item is in your local area and in reasonable condition.