Even a cheap smartphone would be fine to start with. Pics on a website only need a low resolution. It's very well possible it's good enough.
Tip: use the "Save for web" feature in Irfanview (free download) to make them even smaller. The smaller the picture, the faster it loads.
I want to open on online store to sell shoes. So I need to prepare many items, then I just hesitate if I should buy a camera or just a good phone to take pictures about the shoes.
what do you think?