We do have each of these, but the shopping carts are only supported on the Voyager plan (you can still install in Cpanel on the Shuttle plan but we would not provide assistance with them at all on Shuttle). You have 3 shopping carts available:
osCommerce ( www.oscommerce.com
) - PHP
CubeCart ( www.cubecart.com
) - PHP
Agora ( www.agoracart.com
) - perl
As for the merchant account/payment gateway, we partner with Authorize.net and you can contact us for paperwork on using them.
Finally, the SSL certificate you use is based on the plan you have (Voyager or Shuttle) and the language of the shopping cart you would be using. The shared SSL cert that comes with the Voyager plan only works on html and cgi or perl pages, it will not work on ASP, JSP, or PHP ones.
If you want to use any of those languages such as PHP, you would need to purchase a personal SSL certificate, which you can purchase from a 3rd party vendor or from us. Our personal SSL certificates are either $49 or $69 per year based on the amount of coverage you would like to have. The $49 cert covers purchases up to $50 and the $69 one covers purchases up to $2,500. The $69 cert will also include the Trust Logo. Both certs are purchased from Comodo. Regardless of which type of personal cert you purchase (3rd party, $49 or $69 from us), there will be a one-time installation fee of $24.95.
A personal SSL cert requires a dedicated IP, and a dedicated IP costs $2.50 per month paid in a lump sum for your contract term.
Thus, this is why I noted going the PayPal route might be more what you are looking for unless you have a preexisting cart or need to brand the cart to your site instead as the costs and time you will spend will be higher. If you do wish to purchase the SSL certificate and have one on your account as well as getting the details for Authorize.net, please email us at email@example.com and we can assist further.