Looking for a SharePoint 2013 virtual lab, check this out.

We love virtual labs they are free, non hassle and disposable ways to work around SharePoint deployment

SharePoint 2010 virtual lab can be found at
http://technet.microsoft.com/en-in/virtuallabs/bb467605.aspx

expand office servers and select SharePoint 2010 and on the right pane you see all the listed labs and the look amazing.

but if I need SP 2013 labs its not there,
so follow this blog Keith has explained it very well on hos do you go about buying a windows Azure Virtual lab

http://blogs.technet.com/b/keithmayer/archive/2013/01/07/step-by-step-build-a-free-sharepoint-2013-lab-in-the-cloud-with-windows-azure-31-days-of-servers-in-the-cloud-part-7-of-31.aspx