To reduce fraudulent activities and spamming, iList requires phone verification while registering. So you can confidently deals with other members of this community. You can make friends on iList since it's a social network as well. The more friends you have the more visibily your ads will get. iList.com has online messaging system as well.
iList has a nice flash widget in it's Tools & Widgets section. You can put the listings of iList on your blog or site to enrich your site. Other classifieds put your data in a closed locked database and you’re banned if you try to scrape it. At iList, you can retrive your data using some handy APIs found in the iList Developer’s API section.
Today I have signed up on iList. Here is my profile on iList.com.