I will share my own experience.
I was shopping for a travel blender and saw a FABULOUS deal on Olaprice. I clicked to buy. Then, I looked for a PayPal payment option. Unless it is a website I am familiar with, or that friends have recommended, I will stop short if I cannot find a PayPal option.
So, I stopped short and googled. I found THIS and THIS and THIS and THIS.
So, be warned. Do not buy from unknown vendors with your credit card. Reputable ones almost always have a PayPal payment option or a 3rd party one.