SharePoint Server 2013 Download
Some valuable SharePoint 2013 links
Please note: If you’re building a new VM, be sure to check out the requirements. For instance, you’ll need SQL Server 2008 R2 SP1.
And get used to building new machines for your upgrades. The only way to upgrade to SharePoint 2013 is via content database migration. In other words, you need a new 2013 farm. No more in-place upgrades (for those of you who’ve actually done one).