The practice of trade on the Internet is widely accepted by many users.
There are many options available to you should you have the need or desite to trade on-line. Each of these obviously with its own unique pros and cons.
Feel free to contact me if you want to discuss your unique situation and I can give you information on how your requirements can be met.
Instead of re-designing the wheel, I use, where appropriate, the extremely adaptable an omprehensive on-line shopping software of AbanteCart which I will incorporate into your website.
On-line payments are made through the PayGate facility.
See sample on-line shop here.