Best Classified Site list for SEO :-

[seoinheritx1]

clickindia.com
craigslist.org
olx.com
quikr.com
backpage.com
abmresourcesfreeads.yuku.com
gumtree.com
classifiedads.com
oodle.com
ebayclassifieds.com
classifieds.sulekha.com
pistonheads.com
junkmail.co.za
inetgiant.com
classifieds.news.com

[ChristinaCa]

There are few best classified sites:

1.http://www.backpage.com/
2.http://www.tradeindia.com/
3.http://www.sahipasand.com
4.http://www.khojle.in/
5.http://www.quikr.com/
6.http://www.tcnext.com/
7.http://www.tcnext.com/
8.http://www.ads2book.com/
9.http://classifieds.sulekha.com/
10.http://classifieds.webdunia.com/

[Teamwork]

There are best classified sites:
1.http://www.backpage.com/
2.http://www.tradeindia.com/
3.http://www.sahipasand.com
4.http://www.khojle.in/
5.http://www.quikr.com/
6.http://www.tcnext.com/
7.http://www.property.b2shine.in

[Rajesh]

1.http://www.backpage.com/
2.http://www.tradeindia.com/
3.http://www.sahipasand.com
4.http://www.khojle.in/
5.http://www.quikr.com/
6.http://www.tcnext.com/
7.http://www.tcnext.com/
8.http://www.ads2book.com/
9.http://classifieds.sulekha.com/
10.http://classifieds.webdunia.com/
11.http://quicker.com
12.http://clickindia.com/
13.http://locanto.com

Best classified sites

[davidweb09]

olx & quikr are the most popular classified sites for SEO.

[Ship497]

Great list you have shared. Thanks a lot.

[windowmaintenan]

http://london.locanto.co.uk/
http://www.ukadslist.com/view/
http://www.classifiedads.com/
http://www.dewalist.co.uk/
http://www.tendermeforfree.com/
http://www.qtellclassifiedads.com/
http://www.topclassifieds.com/
http://www.sulekhalist.com/
http://classifieds.blackworld.com/
http://www.anunico.co.uk/