Only way I'm using most shopping sites is if I know they're trustworthy and if they support PayPal or one of the major payment processors. I'm not going to type my CC number into a random website and trust that they aren't hacked.
There are a lot of issues with PayPal, but at least it makes it easy for me to get a refund if the seller refuses. The last time I had to get a refund, it was because the seller told me I had to ship my $20 product back to China in order to get a 50% refund. This was despite the returns agreement explicitly requiring them to cover return shipping and that shipping it to China would have cost me about $150.