As an alternative to Joomla VirtueMart you could easily add-in online store buttons in to your Joomla web pages using an ecommerce hosted shopping cart add-in. With this type of store add-in solution you simply copy and paste the store button code in to your Joomla web pages, e.g. Add to Cart button, Buy Now button, Checkout button etc. and other store features like multi-currency price converter, in-page cart summary info etc.
This type of ecommerce hosted shopping cart software solution can make it quick and easy to add-in an online store and often has great features like SKU stock quantity management, multiple product options, multiple shipping plans, digital download product delivery, variety of payment processor connectors, discount codes, special offers, order management to name a number of features you might want to look for in a store add-in.
You can find hosted cart store button add-ins which integrate right in to your web pages so the store becomes a part of your website, with the shopper staying on your website to view their cart and enter shipping details etc.