I can verify that link "RHEV-M Appliance (for RHEV-M 3.5)" on site
https://rhn.redhat.com/rhn/software/channel/downloads/Download.do?cid=24821
points to valid OVA file at
/rhn/isos/rhevm-appliance-3.5/rhel-x86_64-server-6-rhevm-3.5/rhevm-appliance-20150129.0-1.x86_64.rhevm.ova
Before moving to verified I am waiting for Fabian's needinfo to confirm what image formats we should provide.