One Page Check Out for Virtuemart Plugin - No HACK, 100% AJAX, Compatiple with Joomla 3.x and Virtuemart 2.9.8. All Virtuemart sites need One page checkout to make the check out process as simple as possiple while remaining the powerful function, your payment and customer information. There are some One page Check out products on the market, but none of them is default Virtuemart plugin . Studies have shown that one page checkout can increase conversion rates up to 70%