1 - When building a Classifieds make sure you know who your audience are and also which aspects on your Classifieds Website you would like to focus on.
eg: General Classifieds / Property Classifieds can be at times very different.
2 - A Classifieds should always be appealing on the eye! After all thats where you want your users to spend time to buy and sell their very precious items / services / products.
3 - Its always great to make sure that a Classifieds Website has a variety of options for your users to look at when posting an ad.
eg: Free ad, Promoted ad
Above are only a few things to keep in mind and watch our blog for some more information on how to build a awesome Classifieds!