This instant shop can be a stand alone shop or an online catalogue linked to from an existing website. The service can be installed free together with a 3 month free trial which also includes a free professional buisness website hosting account. You also get a free sub-domain in the form of yourname.24hr-shop.net.
If you do not agree that this is the easiest to use (yet most comprehensive) ecommerce instant shop service then you pay nothing You will not even be asked for payment details until after your free trial.
The service includes built in payment processing to accept credit cards and also an optional online finance facility.