From what I can see the 5th is the second set with the details for the 4th being here

http://www.renderosity.com/december-vendor-showcase-sale-cms-16858

 

Theres also some holiday giveaway freebies generously supplied by the vendors here

http://www.renderosity.com/holiday-giveaway-week-1-cms-16848

 

Rhiannon is also having a 7 day sale which started on the 1st here

http://www.renderosity.com/rhiannon-annual-holiday-sale--cms-16849

Hope this helps :)