How i can try and buy later (may be) Confluence version 4

[Ilmira Li]

I not need Confluence version 5, 6 or 7, i need old version - 4

I need cloud, but if it's nor really i can try server version

[Nic Brough -Adaptavist-]

If you want to use Cloud Confluence, then you get the latest version.  Cloud is almost always ahead of Server and you have no say over the version.  A trial will simply expire after 7 days if you don't pay.

For server, have a look at the downloads page and look for the "archive versions" link.  You'll be able to download any previous version.  Your trial will last a month.