Yes, you can order one of the following VPS packages for testing them out for 3 days:
Linux HDD Sandbox, Linux HDD 1, Linux HDD 2
Linux SSD Sandbox, Linux SSD 1, Linux SSD 2
To do so, please create an order with one of these packages (without paying) and open a support ticket requesting a trial. Please provide the Invoice number that was issued for the server.
Windows VPS are not eligible for free trial due to licensing limitations
Only one trial server can be activated per customer